Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes

Explanation

### Step-by-Step Text Solution

**(i) Atomic Number:**
The atomic number (Z) of an element is defined as the number of protons present in the nucleus of an atom. It is unique for each element and determines the identity of the element. For example, the atomic number of carbon is 6, which means that a carbon atom has 6 protons.

**Example:**
- Carbon (C): Atomic number = 6 (Number of protons = 6)

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