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Atomic Valency

What is meant...

Question

What is meant by valency of elements ?

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Solution

The valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules.

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Q. Answer the following
A. Whati is the difference in the atomic models of Thomson and Rutherford ?
B. What is meant by valency of an element ? what is the relationship between the number of valence electron and valency ?
C. What is meant by atomic mass number ? Explain how the atomic number and mass number of carbon are 6 and 12 respectively.
D. what is meant by subatomic particle ? give brief information of three subatomic particles with refrence to electrical charge, mass and location.

Answer the following questions.

(a) What is the difference between the models of the atom proposed by Thomson and by Rutherford?

(b) What is the characteristic property of the element hydrogen?

(c) What is meant by valency?

(d) What is meant by atomic mass number?

(e) Name the fundamental particles in an atom.

What is variable valency ? Give two examples of elements showing variable valency.

Q. What is meant by periodicity of an element?

Q. What do you understand by valency of an element? Is it possible to state the metallic and the non metallic character of an element from their valency?
Can an element show varaible valency. Explain why? [5 MARKS]

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