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The subshell electronic configuration of...

The subshell electronic configuration of A,B,C and D are given below.
`A - 1s^2 2s^2 2p^6 3s^2 3p^4`
`B - 1s^2 2s^2 2p^6 3s^2`
`C - 1s^2 2s^2 2p^6 3s^2 3p^5`
`D - 1s^2 2s^2 2p^6 3s^1`
a. Which of these elements can show +2 oxidation state?
b. Which element belongs to 17th group?
c. Find the period of elements A what is the basis of this finding?
d. Which of these elements can form oxides of basic character?

Text Solution

Verified by Experts

a. B
b. C
c. Period - 3
period number = number of shells
d. B,D
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