Write the electronic configuration of any one pair of isotopes and isobars.

Isotopes of carbon:(_16^12)C    and (_16^13)C12

6C and 13

6C Electronic configuration is 2,4 because both the

atoms have the same atomic number and the same number of electrons as 6.

Isobars:

(_20^40)Ca   - 2,8,8,2 as atomic number is 20 and 40

(_80^40)Ar- 2,8,8 as atomic number is 18

Explanation:

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answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.