Intext questions X — task. Science CBSE, Class 9.

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

Electronic configuration of first atom

Electronic configuration of second atom

Answer variants:

(2, 4, 2)

(2, 4)

$_{6}\textrm{O}^{12}$ ,

$_{6}\textrm{C}^{14}$

(2, 8, 8, 2)

(2, 6)

$_{20}\textrm{Ca}^{40}$ ,

$_{18}\textrm{Ar}^{40}$

(2, 8, 8)

$_{6}\textrm{C}^{12}$ ,

$_{6}\textrm{C}^{14}$

$_{17}\textrm{Cl}^{35}$ ,

$_{18}\textrm{Cl}^{37}$

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28. Intext questions X