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in Periodic Table and Electronic Configuration by (37.7k points)
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Examine the given electronic configurations. 

A – 1s2 2s2 2p6 3s2 3p6 3d10 4s2

B – 1s2 2s2 2p6 3s1 

C – 1s2 2s2 2p1 3s2 3p6

D – 1s2 2s2 2p6 3s2 

E – 1s2 2s2 2p6 3s2 3p6 4s2 

a. Which of these elements belongs to 4th period? 

b. Which elements belongs to the same group ? 

c. Which element doesn’t participate in chemical reactions generally ? 

d. Which element has highest metallic character ?

1 Answer

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by (35.5k points)
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Best answer

a. A, E 

b. B, E 

c. C 

d. E

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