Okay so the electron configuration is [tex]1s^{2}2s^{2}2p^{5}[/tex]. Look at the periodic table. There are 2 blocks you need to know for this question: the s-block, which is comprised of groups 1 and 2, and the p-block, which is comprised of groups 13 through 18. Because your configuration ends in [tex]p^5[/tex], your element has to be in group 17, a halogen. Now, you need to know another thing - your s sub-level has 1 orbital and your p sub-level has 3 orbitals. Every orbital can fill up with 2 electrons. Now, the fact that the configuration ends in [tex]s^{2}...p^{5}[/tex] tells you that the s-orbital is filled, and your p sub-level is not completely filled. If it was, you would have 8 valence electrons, and it would end in [tex]p^6[/tex]. Now, because it ends in [tex]p^5[/tex], it has one less valence electron, so in your element you have 7 valence electrons.
The electronic configuration of an element is 1s²2s²2p⁵, it will have 7 valence electrons. The correct option is C.
An element's electrical configuration is 1s²2s²2p⁵. We need to take into account the outermost energy level, which is the second energy level (marked by the number "2"), in order to calculate the amount of valence electrons.
There are a total of three sublevels in the second energy level: 2s, 2px, 2py, and 2pz. The maximum number of electrons that can be held by the 2s sublevel is 2, and the same is true for the 2p sublevels (2px, 2py, and 2pz).
As can be seen from the electrical structure, there are 2 electrons in the 2s sublevel (1s²2s²) and 5 electrons in the 2p sublevels (2p⁵). Thus, there are seven valence electrons in all for the element.
Thus, the correct option is C 7.
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Your question seems incomplete, the probable complete question is:
The electronic configuration of an element is 1s22s22p5. How many valence electrons does it have?
A. 4
B. 5
C. 7
D. 9
A dog pushes a toy horizontally on a frictionless floor with a net force of 2.0\, \text N2.0N for 1.0\,\text m1.0m. How much kinetic energy does the toy gain?
Answer:
2.0 J
Explanation:
Since the surface is frictionless, we can solve the problem by using the work-energy theorem, which states that the work done on the toy is equal to the kinetic energy gained by the toy:
[tex]W=\Delta E_k[/tex]
where
W is the work done on the toy
[tex]\Delta E_k[/tex] is the kinetic energy gained by the toy
The work done can be calculated as the product between the force applied on the toy and its displacement, so:
[tex]W=Fd=(2.0 N)(1.0 m)=2.0 J[/tex]
Therefore, according to the work-energy theorem, the toy has gained 2.0 J of kinetic energy.
Answer: 2 J
Explanation: Kinetic energy is possessed by a body due to virtue of its motion. A body gains kinetic energy when some work is done on it.
W = Δ K.E.
We know that work is said to be done on a body when a force causes displacement of the body.
W = F.s
It is given that net force on the toy, F = 2.0 N which displaces the toy by, s = 1.0 m.
Hence, work done on the toy, W = 2.0 N × 1.0 m = 2 J which is equal to the kinetic energy gained by the toy.
By now, you know that sound is produced by vibrations. These vibrations can travel through solids, liquids, and gases, but not through ______________.
Answer:
empty space
Explanation:
hydrostatic pressure is deadly to sea creatures true or false
It is to some sea creatures. Like the ones with air filled areas like lungs and swim bladders
The correct answer is false. Just took the test
what are the factors that effect the strength of a frictional force???
the acceleration of an object
the color and density of an object
the buoyant forces acting on an obeject
the mass of an object and how rough te surface is
If you write down the formula for friction, you will get an answer.
Ff = u * N Where N is a push down force that an object experiences.
u (mu) is a constant and has no units
It may not be accelerating and still experience friction. A is not correct.
Color and Density will not affect the frictional force. B is not so.
Buoyant forces are a different thing altogether. Generally friction has nothing to do with them. C is incorrect.
The last one is your answer. Technically mg should be the answer and not mass, but the second part is correct.
Which element has a full valence shell of electrons?
A. Magnesium (Mg)
B. Neon (Ne)
C. Chlorine (Cl)
D. Silicon (Si)
I think neon because it is all the way to the right
A 5.0 kilogram rock rolls off the edge of a cliff. If it is traveling at a speed of 24.2m/s when it hits the ground, what is the height of the cliff?
Using the kinematic equation ;
vf²=vi²+2ad just rearrange for d;
vf²-vi²=2ad;
(vf²-vi²)/2a=d
Now plug the numbers in.
vf=24.2
vi=0
a=9.81=g
(24.2²-0²)/(2*9.81)=29.8 m.
Ways of thinking, feeling, or acting that are unusual are _____ of a mental disorder.
A.always a part
B.unusual aspects
C.functions
D.symptoms
Ways of thinking, feeling, or acting that are unusual are symptoms of a mental disorder.
Answer: Option (D) is the correct answer.
Explanation:
When a person thinks, feels or acts in ways which are not normal or which are unusual in many ways then this activity is considered as symptoms of a person's behavior.
For example, a women argues with everyone without any reason.
So, when a person suffers from some any mental disorder then he doesn't know what he is saying, doing or expressing.
Hence, we can conclude that ways of thinking, feeling, or acting that are unusual are symptoms of a mental disorder.
label the parts of a wave the terms : crest ,trough, frequency, wavelength, amplitude
We have that Crest ,trough, frequency, wavelength, amplitude you will be able to label the wave in Question.
From the question we are told
Label the parts of a wave the terms : crest ,trough, frequency, wavelength, amplitude
Generally
CrestThis is the defined as the vertical distance covered by a wave.
TroughThis speaks of lowest point of a wave the inverse of the crest
FrequencyThis is the is defined as the inverse of
WavelengthThis is defined as the peak to peak distance of a wave
AmplitudeThis defines the maximum height attained by the wave.
Therefore
With above definition of Crest ,trough, frequency, wavelength, amplitude you will be able to label the graph in Question
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A person walks 25 m east 35 m north 25 me west and 5 m south. What's the distance traveled?
Injuries can be prevented if you follow the rules, use protective equipment, and know the risks of injuries involved in each sport. Please select the best answer from the choices provided. T F
Answer:
The given statement is true
Explanation:
Injuries are the ones that cut skin, tissues. Injuries include cuts, scratches, scrapes and punctured skin and worst case is fatal.
Normally injury is caused by external force, includes damages done to the body.
Definitely injuries can be prevented if rules are followed, protective equipments are used. Also in each sport, risks of injuries if known measures can be taken to prevent the injuries
The given statement is true
Injuries can be preventable if you follow the rules, use protective equipment is a true statement.
What is Injury?This is defined as harm to the body and is usually associated with pain, bleeding etc.
This can be avoided when performing sports through using protective equipment and risks involved in the sport.
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What is a molecule?
A. A group of positive ions surrounded by delocalized electrons
B. A group of ionically bonded atoms
C. Two oppositely charged ions
D. A group of covalently bonded atoms
D isd your answer buddy
Help with 5 and the question below. BRAINLIEST FOR THE CORRECT ANSWER! Urgent Physics help!
You are trying to hear your friend give directions to new store in town. But from your distance of 15 m you only hear a whisper of about 20 dB intensity. You move closer to bring the conversation up to a sound level of about 50 dB. How close do you need to be?
100 cm
333 cm
90 cm
47 cm
90 cm
Sound level at distance of 15 m is given as 20 dB
so intensity at this distance is given as
[tex]L = 10 Log\frac{I}{I_0}[/tex]
[tex]20 = 10 Log{I}{10^{-12}}[/tex]
[tex]I_1 = 10^{-10}W/m^2[/tex]
now if we move closer to some some distance the sound level is now 50 dB
now the intensity is given as
[tex]L = 10 Log\frac{I}{I_0}[/tex]
[tex]50 = 10Log\frac{I}{10^{-12}}[/tex]
[tex]I_2 = 10^{-7}W/m^2[/tex]
now we know that
[tex]\frac{I_1}{I_2} = \frac{r_2^2}{r_1^2}[/tex]
[tex]\frac{10^{-10}}{10^{-7}} = \frac{r_2^2}{15^2}[/tex]
[tex]r_2 = 47 cm[/tex]
so now the distance from friend must be 47 cm
The histogram below shows the number of downloads of a song over time.
Approximately how many downloads were there between 8 p.m and 9 p.m?
Given data:
It is a graphical display where the data is grouped in to rangesA diagram consists rectangles, whose area is proportional to frequency of a variable and whose width is equal to the class interval. It is an accurate representation of the distribution of numerical data.From Figure:
Each box in the graph (small rectangle box) is assumed to be one download. So, in the graph the time between 8 p.m to 9 p.m, the number of downloads are 8.75 approximately (because the last box is incomplete, therefore 8 complete boxes and 9th is more than half).
So, We conclude that the total number of downloads are approximately 9 in the time span of 8 p.m. to 9 p.m.
Which vector below goes from (0,0) to (1,-3)?
The vector that goes from (0,0) to (1,-3) can be found by subtracting the initial point (0,0) from the terminal point (1,-3). So, the vector that goes from (0,0) to (1,-3) is (1, -3).
The vector that goes from (0,0) to (1,-3) can be obtained by subtracting the initial point (0,0) from the final point (1,-3). The x-component of the vector is the difference in x-coordinates: 1 - 0 = 1.
The y-component of the vector is the difference in y-coordinates: -3 - 0 = -3.
Therefore, the vector that goes from (0,0) to (1,-3) is represented as (1, -3) in the form of (x-component, y-component). Visually, the vector (1, -3) points from the origin (0,0) in the positive x-direction (to the right) by a distance of 1 unit and in the negative y-direction (downward) by a distance of 3 units.
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The light from Star 1 reaches Star 3 in 138 years and Star 2 in 63 years. Which of these conclusions about the stars is correct?
A.The distance between Star 2 and Star 3 is 75 light years.
B.The distance between Star 2 and Star 3 is 201 light years.
C.Star 2 is 138 miles away from Star 3.
D.Star 2 is 63 kilometers away from Star 3.
The correct answer is A
The distance between Star 2 and Star 3 is 75 light years.
Explanation:The distance between stars in space can vary significantly. In our Milky Way galaxy, stars are typically separated by many light-years, with the closest star system, Alpha Centauri, about 4.37 light-years away from our solar system. However, interstellar distances can range from fractions of a light-year to many thousands of light-years, depending on the specific stars and their locations within the galaxy or the universe.
The distance between Star 2 and Star 3 can be calculated by subtracting the time it takes for light to travel from Star 1 to Star 2 (63 years) from the time it takes for light to travel from Star 1 to Star 3 (138 years). So, the distance between Star 2 and Star 3 is 75 light years (option A).
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Nyah explains to Arman the importance of decomposers in an ecosystem. Which sentence(s) should she use in her explanation? Select all that apply.
A.) Decomposers provide food for consumers.
B.) An ecosystem cannot function without decomposers.
C.) Most ecosystems have only one type of decomposer.
D.) Decomposers help to recycle nutrients in an ecosystem
E.) Fungi, plants, and insects are examples of decomposers.
The Sentences Nyah should use in her Explanation are :
B. An Ecosystem cannot Function without Decomposers.
D. Decomposers help to recycle nutrients in an Ecosystem.
Because :
✿ Producers provide food for Consumers.
✿ Ecosystems have many types of Decomposers like Bacteria & Fungi.
✿ Plants are not Examples of Decomposers.
Final answer:
Decomposers like fungi and bacteria are crucial for ecosystem functionality as they recycle nutrients, enabling the survival and stability of ecosystems. They prevent waste buildup and support the cycle of life by converting dead matter into essential nutrients for producers.
Explanation:
Nyah explains to Arman the importance of decomposers in an ecosystem. The sentences that should be used in her explanation are:
B.) An ecosystem cannot function without decomposers.
D.) Decomposers help to recycle nutrients in an ecosystem.
Decomposers, such as fungi and bacteria, play a critical role in sustaining ecosystems by breaking down dead organisms and organic waste. This process recycles essential nutrients like carbon and nitrogen back into the soil, which are then available for producers, such as plants, to use. By converting dead matter into nutrients, decomposers ensure the stability and survival of ecosystems, preventing waste accumulation and enabling the continuous cycle of life.
3)
Which bones are used to determine age?
A) skull, femur, spine, and phalanges
B) radius, ulna, spine, and femur
C) skull, clavicle, sternum, and sacrum
D) femur, sacrum, pelvis, and skull
4)
How many teeth does a human adult have?
A) 25
B) 27
C) 30
D) 32
5)
Shelia was abducted from a school football field, taken to a bank, and forced to withdraw money from an ATM machine. Afterward, she was left abandoned in a car at a local park. Which is the primary crime scene?
A) bank ATM
B) car
C) park
D) football field
Eliminate
D. Femur, sacrum, pelvis and skull
When you look at the isotopes of one element, the number of protons__________
Answers:
Changes, Stays the Same
Answer: the number protons stayed the same.
Explanation: an isotope has equal number of protons but different number of neutrons resulting in different atomic mass but the same chemical properties.
The dodo bird is now extinct. What factor would not have led to its extinction?
A) The forests the dodo lived in where cut down.
B) Sailors landed on the island and killed many for food.
C) It was well adapted to living on the island of Mauritius.
The well adaptability of dodo's in living on the island of Mauritius is the factor that would not have led to dodo's extinction.
What is dodo bird?Dodo is a bird that cannot fly i.e. it is flightless. It is now extinct. Earlier it was found in Mauritius to the east of Madagascar. Rodrigues solitaire, which are genetically related to dodo bird are also categorized as extinct.Given is to find the factor would not have led to the extinction of dodo birds.
If the forests are cut down or Sailors would have landed to kill many for food, it would lead to the extinction of dodo birds. The factor that would not have led to dodo's extinction is the well adaptability of dodo's in living on the island of Mauritius.Therefore, the well adaptability of dodo's in living on the island of Mauritius is the factor that would not have led to dodo's extinction.
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A bowling bowl is thrown off the top of a building. Determine distance the ball has fallen after falling for 3.0 s. Remember, the gravitational acceleration (g) is 9.8 m/s2. (Hint: d = ½gt2)
d = distance the bowling ball has fallen = ?
g = acceleration due to gravity acting on the ball by earth = 9.8 m/s²
t = time of fall for the ball = 3.0 s
distance the ball has fallen is given as
d = (0.5) g t²
inserting the above values in the equation above
d = (0.5) (9.8 m/s²) (3.0 s)²
d = (0.5) (9.8 m/s²) (9.0 s²)
d = (4.9 m/s²) (9.0 s²)
d = 44.1 m
hence the distance fallen by the ball comes out to be 44.1 m
A hippogriff is a large flying creature that Hagrid watches over at Hogwarts. if the Hippogriffs mass is 1300kg then what is it’s weight? (Remember that the acceleration of gravity is -9.8m/s^3). Use the formula w=m•g
Show all your work
Answer:
12,740 N
Explanation:
The weight of the hyppogriff is given by:
[tex]W=mg[/tex]
where
m = 1300 kg is the hippogriff's mass
g = 9.8 m/s^2 is the acceleration due to gravity
Substituting the numbers into the equation, we get:
[tex]W=mg=(1300 kg)(9.8 m/s^2)=12,740 N[/tex]
The answer is 12,740 i just did test
The metric unit of force is the _____.
A.newton
B.pound
C.kilogram
D.watt
A force is calculated in neutons
Answer: newton
Explanation:
Which statement best describes the motion of the dots?
a) They are slowing down because less distance is covered per unit of time
b) They are speeding up because more distance is covered per unit of time
c) The speed is constant because the distance between the dots remain the same
Provided the dots represent time-lapse snapshots of an object's motion from left to right, then
(a) The underlying object is slowing down because the distance between adjacent snapshots (dots) decreases with time
(the answer is intentionally reworded to avoid sounding nonsensical)
The answer is B or A im pretty sure its B thou
What is the term for a compound made from only two elements?
dual
basic
binary
diatomic
Answer:
Binary
Explanation:
When two compounds are made from specifically only of two elements, that compound is known as binary. Binary compounds can be of two types
1. where two elements are different and only one atom of each element would participate in compound making. some of the examples are:- sodium chloride(one sodium and one chlorine).
2. Where more than one atom of each element participate such as nitrous oxide(two atoms of nitrogen and one of oxygen).
Increasing the surface area of two objects would drease the heat transfer between them. True or False
i think the answer is true
Which describes the two parts of a measurement? a unit and a symbol a conversion factor and a number a symbol and a conversion factor a number and a unit
The measurement consists in comparing a selected pattern with the object or phenomenon whose physical magnitude is going to be measured, to find out how many times the pattern is contained in that magnitude. That is, it is about identifying or quantifying a particular characteristic or aspect of a particular object or construct.
Now, a well done measurement has two parts:
-The number gives us information about the quantity of the measurement, or in other words, the magnitude of the measurement and its precision.
-The units gives us information about the property that is being measured. This is quite important, because a measurement or result with no units is useless.
Note the units may be expressed with letter or symbols, depending on what we are measuring.
A measurement consists of two important parts: a number and a unit. The number provides the quantity, and the unit indicates the standard of measure.
Explanation:The two parts of a measurement are a number and a unit. For example, if you measure the length of a desk and find it to be 150 cm, '150' is the number, and 'cm' or centimeters is the unit.
The number tells you 'how much', and the unit tells you 'of what'. '150 centimeters' means 150 times the defined length of a centimeter.
Each part is necessary for the measurement to make sense and be useful. Without the number, you wouldn't know 'how much', and without the unit, you wouldn't know 'of what'.
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How much current is in a circuit that includes a 9.0 volt battery and a bulb woth a resistance of 4.0 ohms
According to Ohm's law for a portion of the circuit we have:
U=RI=>I=U/R=9/4=2.25 A
Answer:
Current in the circuit, I = 2.25 A
Explanation:
Given that,
Voltage of the battery, V = 9 V
Resistance of the bulb, R = 4 ohms
We need to find the current in the circuit. It can be calculated using Ohm's law. Ohm's law gives the relationship between the current, resistance and the voltage as :
[tex]V=IR[/tex]
[tex]I=\dfrac{V}{R}[/tex]
[tex]I=\dfrac{9\ V}{4\ \Omega}[/tex]
I = 2.25 A
So, the current flowing in the circuit is 2.25 amperes. Hence, this is the required solution.
What is newtons 4th law
Hello!
There is actually no 4th law. There is only 3. The gravitational law is not considered the 4th law.
Hope this helps! Have a lovely day! ~Pooch ♥
According to evolutionary-oriented astronomers, the universe came into being by _____, _____ processes.
Fission and fusion process
the first part is physical
Satellite technology has allowed us to monitor areas that were once so remote that we had no way of monitoring them. Review the statements and choose the one that best describes how we can use this technology to benefit the environment.
Large ocean liners use satellites to aid in navigation. This type of navigation aid is also used on cruise ships. Using satellites can help these large ships navigate waters during bad storms.
Satellite surveillance can be used to aid in port security. Satellite data can be monitored and evaluated by complex computer systems. These systems can alert officials when something unusual occurs.
Satellite technology allows us to monitor and track the changes in the polar ice sheets. This can help us plan and direct conservation efforts for the animals that depend on polar ice in order to survive.
Satellite surveillance has allowed us to map areas that were previously too remote to observe. This helps developers to locate and choose sites for large resorts.
Answer: Satellite technology allows us to monitor and track the changes in the polar ice sheets. This can help us plan and direct conservation efforts for the animals that depend on polar ice in order to survive.
Explanation:
A satellite orbits around Earth. We have different satellites for different purposes. A satellite has transmitter and receiver for sending and receiving information. For the use of environment, only one statement seems correct that is: Satellite technology allows us to monitor and track the changes in the polar ice sheets. This can help us plan and direct conservation efforts for the animals that depend on polar ice in order to survive.
Rest options are true but not from the environment point of view.
We know that animals are dependent on the environment for their survival. polar ice caps are difficult to reach and monitor. For making conservation plan for the animals residing in these remote areas, satellite technology is very crucial.
Answer:
Satellite technology allows us to monitor and track the changes in the polar ice sheets. This can help us plan and direct conservation efforts for the animals that depend on polar ice in order to survive.
Explanation: