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in Periodic Table and Electronic Configuration by (37.7k points)
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The atomic number of four elements are given below. (The symbols ore not real) 

A – 8 

B – 10 

C – 12

D – 18 

a. Write the sub-shell electronic configuration of the elements, 

b. Which of them are inert gases? 

c. Write the chemical formula of the compound formed by two elements other than inert gases.

1 Answer

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Best answer

a. A – 1s2 2s2 2p4

B – 1s2 2s2 2p6

C – 1s2 2s2 2p6 3s2 

D – 1s2 2s2 2p6 3s2 3p6 

b. B, D 

c. CA, (C2 A2 is simplified and written as CA)

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