Question

Q2. A)Answer the following questions:
a) Define: i) Atomic mass number
ii) Variable valency
Ans:​

Answer 1

i) Atomic mass unit is defined as the average mass of an object as compared to the mass of an C-12 atom.

ii) Some object differ in their combining capacity with other element depending on the nature of the reaction, this property is called Variable Valancy.

Answer 2

Answer:

The total no of protons present in an atom is called it's atomic number. it is represented with the letter Z

Some elements that differ in their capacity to combine with other elements depending upon their nature of the reaction.This property of the element is called it's variable valency . Eg copper has variable valency