Two atoms are said to be isobars if

Options

A. they have same atomic number but different mass number
B. they have same number of electrons but different number of neutrons
C. they have same number of neutrons but different number of electrons.
D. sum of the number of protons and neutrons is same but the number of protons is different.

Explanation

To determine the definition of isobars, let's break down the concept step by step.

### Step-by-Step Solution:

1. **Understanding Atomic Structure**:
- Every atom is characterized by its atomic number (Z) and mass number (A).
- The atomic number (Z) represents the number of protons in the nucleus of an atom.
- The mass number (A) is the total number of protons and neutrons in the nucleus.
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