Which of the following pairs represent isotopes and which represent isobars?
`""_(1)^(3)H,""_(2 )^(3)He`
Calculate the difference in the number of neutrons in the isotopic pairs.

Explanation

To determine whether the given pairs represent isotopes or isobars, we need to understand the definitions of isotopes and isobars.

1. **Definitions**:
- **Isotopes**: These are atoms of the same element that have the same atomic number (number of protons) but different mass numbers (number of protons + number of neutrons).
- **Isobars**: These are atoms of different elements that have the same mass number but different atomic numbers.

2. **Given Pair**:
- \( _{1}^{3}H \) (Hydrogen-3)
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