Which of the following accurately describes properties of valence? A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
B. Metals tend to have a negative valence and tend to be electron borrowers.
C. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
D. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
Answers
Answer: Option (D) is the correct answer.
Explanation:
According to the octet rule, in order to attain stability every atom requires to complete its octet by gaining or losing valence electrons.
The reactivity of an atom depends on the number of valence electrons. Smaller is the number of valence electrons to be gained or lose, the greater will be the activity of atom.
For example, atomic number of chlorine is 17 so, it just needs to gain one more electron to completely fill its shell. Whereas atomic number of aluminium is 13 so, it needs to lose 3 electrons in order to gain stability.
Thus, activity of chlorine atom will be more as compared to aluminium atom.
Thus, we can conclude that smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
Answer: Option (D) is the correct answer.
Explanation:
Valence electrons are the electrons present in the outermost shell of an element.
For example, fluorine is a non-metal with atomic number 9. It contains 7 valence electrons and in order to attain stability it needs to gain only one electron.
Therefore, it is very reactive in nature. This also means that smaller is the electrons an atom needs to borrow or lend higher will be its reactivity.
Thus, we can conclude that the statement smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom, accurately describes properties of valence.
Related Questions
Why does it take less time for small rocks to wear away than it does for large rocks to wear way?
A cessna 150 airplane has a takeoff speed of 28 m/s. determine the minimum length of the runway which would be required for the plane to take off if it averages an acceleration of 1.9 m/s/s.
Determine the volume at the equivalence point if a 0.100 M NaOH(aq) solution is used to titrate the following acidic solutions: (a) 50.0 mL of 0.200 M HBr(aq) (b) 30.0 mL of 0.150 M HNO3(aq)
Why is it important for scientists to measure how much precipitation is falling across the world?
Answers
Answers
If all the components of a vector is equal to 1, then that vector is not a unit vector but .
Answer: False
Explanation:
Unit Vector
A vector which defines the direction of a physical quantity is known as a Unit Vector. For a vector, the unit vector is the vector/ mod of the value. Since the mod of a unit vector is always 1, the value is simply represented as its vector form.
If we take all the components of a vector quantity as 1, then its mod will be,
i.e.
which is not a unit vector.
Hence, the given statement is false.
Final answer:
All components of a vector being equal to 1 does not necessarily define a unit vector. A unit vector is defined by having a magnitude, or length, of 1. Unless it's a 1-D vector with its single component as 1, a vector with all components as 1 won't be a unit vector.
Explanation:
In mathematics, particularly vector algebra, a unit vector is a vector of length 1. The condition you've mentioned – all components of a vector being equal to 1 – does not generally define a unit vector. When the components of a vector are all 1s (in a 2D or 3D space, for instance), the resultant vector is not a unit vector. This is because the magnitude or length of a vector is calculated by the square root of the sum of the squares of its components.
Learn more about Unit Vector here:
#SPJ3
A. Displacement
O B. Time
C. Acceleration
D. Average speed
Answers
Final answer:
To calculate velocity in Physics, the two necessary measurements are displacement and time. Velocity is the speed in a specified direction, determined by dividing displacement by time.
Explanation:
In the field of Physics, the two measurements needed to calculate the velocity of an object are displacement and time. Velocity refers to the speed in a given direction and is calculated by dividing displacement (which gives direction information and distance) by the time it takes to move that distance. For example, if an object traveled 100 meters to the north in 20 seconds, the velocity would be 5 meters per second towards the north.
Learn more about Velocity here:
#SPJ3
Answer:
A. Displacement
B. Time
Your Welcome ❤
B. reaction to pheromones
C.molecule in a cell changes function of cell
D. control of cell division
Answers
The phrase which is not an example of intracellular communication is :
C) Molecule in a cell changes function of cell.
"Intracellular communication"
The phrase which is not an example of intracellular communication is the molecule in a cell changes function of cell.
The intracellular communication could be a sort of communication which takes put inside a cell or interior a cell.
The intracellular speaks to inside a cell, subsequently, the development of the particle inside a cell may be with cytoplasmic gushing, cargo vesicle transport or any other instrument will speak to the intracellular communication.
Thus, the correct answer is C.
Learn more about "Intracellular communication":
Answer:
The answer is C
Explanation:
I ave K12 and i just finished it.
Answers
For a pendulum with a massless rope 'L' meters long, swinging through
a small arc, the period of the swing is
2 π √(L/g) seconds .
and it doesn't depend on the mass of the thing on the end of the rope ...
that could be a pebble or a bus.
For the girl on the 2.5-m rope,
Period = (2 π) √(2.5 / 9.8) = 3.17 seconds
Frequency = 1 / period = about 0.315 Hz .
If a girl with a mass of 40 kg is swinging from a rope with a length of 2.5 m , then the frequency of her swinging is 0.32 Hz
Further explanation
Simple Harmonic Motion is a motion where the magnitude of acceleration is directly proportional to the magnitude of the displacement but in the opposite direction.
The pulled and then released spring is one of the examples of Simple Harmonic Motion. We can use the following formula to find the period of this spring.
T = Periode of Spring ( second )
m = Load Mass ( kg )
k = Spring Constant ( N / m )
The pendulum which moves back and forth is also an example of Simple Harmonic Motion. We can use the following formula to find the period of this pendulum.
T = Periode of Pendulum ( second )
L = Length of Pendulum ( kg )
g = Gravitational Acceleration ( m/s² )
Let us now tackle the problem !
Given:
Mass of A Girl = m = 40 kg
Length of Rope = L = 2.5 m
Gravitational Acceleration = g = 10 m/s²
Unknown:
Frequency of Swinging = f = ?
Solution:
Recall the formula for calculating period as mentioned above.
Finally, we can calculate the magnitude of frequency with the following formula.
Learn more
- Model for Simple Harmonic Motion : brainly.com/question/9221526
- Force of Simple Harmonic Motion : brainly.com/question/3323600
- Example of Simple Harmonic Motion : brainly.com/question/11892568
Answer details
Grade: High School
Subject: Physics
Chapter: Simple Harmonic Motion
Keywords: Simple , Harmonic , Motion , Pendulum , Spring , Period , Frequency
virtual
the same in size
smaller in size
Answers
An object that is farther from a converging lens than its focal point always has an image that is virtual. Option (b) is correct.
An optical lens that is thicker in the center and narrower at the corners is referred to as a converging lens, also known as a convex lens. Because it causes parallel light rays to converge or come together at a certain location known as the focal point, it is referred to as a "converging" lens.
The image created is virtual, meaning that it appears to be on the same side of the lens as the object when an object is placed farther away from a converging lens than its focal point. The virtual image is also enlarged, making it look bigger than the actual object. Additionally, the image is upright, not inverted.
Hence, an object that is farther from a converging lens than its focal point always has an image that is virtual. Option (b) is correct.
To learn more about converging lens, here:
#SPJ3