Question

Write electronic configuration of element having atomic number 12,15 and 17

Answer 1

$\bold{Answer:}$

12 = 2,8,2 valency 2 ,

The element with the atomic number 12 is magnesium. The atomic number indicates the number of positively charged protons in each magnesium nucleus. A neutral atom has equal numbers of protons as negatively charged electrons. The electron configuration of a neutral magnesium atom

15=2,8,5 valency 8-5=3 ,

17=2,8,7 valency 8-7=1 .

Answer 2

Explanation:

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