Question

1. concept of polarizability
2. vibrational Motion effect.

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Answer 1

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Here is your answer goes like this :
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1)When in the presence of an electric field, their electron clouds can be distorted........
The ease of this distortion is defined as the polarizability of the atom or molecule........

2)Vibration can cause changes in tendons, muscles, bones and joints, and can affect the nervous system......


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Answer 2

Polarizability••••

When two oppositely charged ions comes closer than the positively charged ion distort the electron cloud of the negatively charged ion towards itself. Consequently the electron cloud on the negatively charged ion get polarized, and the electron density pulled in between the nuclei of the two atoms.That is what happen in the covalent bond ,where the electrons remain in between the nuclei of the two atoms.

The ability of the negatively charged ion to undergo distortion is called the polarizability.

The power of the cation to cause distortion in the anion is called its polarizing power. Smaller the cation more will be its polarizing power. On the other hand polarizability of the anion depends on the following factor:-

Larger the size of the anion more it will get polarized. For example in LiI , the anion has larger size will get more polarized as compared to the LiF.

a periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear) b : the action of vibrating : the state of being vibrated or in vibratorymotion: as (1) : oscillation (2) : a quivering or trembling motion : quiver 2 : an instance of vibration 3 : vacillation in opinion or action : wavering 4 a : a characteristic emanation, aura, or spirit that infuses or vitalizes someone or something and that can be instinctively sensed or experienced —often used in plural b : a distinctive usually emotional atmosphere capable of being sensed —usually used in plural.
Examples of VIBRATION
trying to reduce engine vibration
the vibration of the floor caused by thundering feet in the hallway