Atomic numbers of oxygen and sulphur are 8 and 16 respectively. Oxygen atom has 8 neutrons and sulphur atom has 16 neutrons. Find out the mass number of oxygen and sulphur atom.

Explanation

To find the mass number of oxygen and sulfur, we can follow these steps:

### Step 1: Understand the definition of mass number
The mass number of an atom is the total number of protons and neutrons in its nucleus. It can be calculated using the formula:
\[ \text{Mass Number} = \text{Number of Protons} + \text{Number of Neutrons} \]

### Step 2: Identify the atomic number and number of neutrons for oxygen
- The atomic number of oxygen (O) is 8. This means that oxygen has 8 protons.
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