2 s 2 - 2 s 2 2 p 6- 3 s 2 - 3 s 2 3 p 6- 4 s 2- Given electronic configuration represents which group-A- Group II AB- None of theseC- Group I AD- Group III A

Byju's Answer

Standard VIII

Chemistry

Variable Valency Representing

2 s 2 ; 2 s 2...

Question

$2 s^{2}; 2 s^{2} 2 p^{6}, 3 s^{2}; 3 s^{2} 3 p^{6}, 4 s^{2}$ . Given electronic configuration represents which group?

Group I A

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Group II A

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Group III A

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None of these

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Solution

The correct option is A
Group II A

The 's' is the outermost orbital in this case and it contains two valence electrons. Thus the given electronic configuration belongs to Group II A.

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(a) What is the fundamental difference in the electronic configurations between the group 1 and group 2 elements?

(b) On the basis of electronic configuration, how will you identify :

(i) chemically similar elements?

(ii) the first element of a period?

Q. The atom having the valence shell electronic configuration

4 s^{2} 4 p^{2}

would be in?

Q. Where would you locate the element with electronic configuration 2, 8 in the modern periodic table?

(a) group 8
(b) group 2
(c) group 18
(d) group 10

Q. Write the general electronic configuration of noble gas group. Which element of this group is useful in magnetic resonance imaging (MRI)?

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Variable Valency Representing

Standard VIII Chemistry

2s2;2s22p6,3s2;3s23p6,4s2. Given electronic configuration represents which group?

The correct option is A Group II A The 's' is the outermost orbital in this case and it contains two valence electrons. Thus the given electronic configuration belongs to Group II A.

$2 s^{2}; 2 s^{2} 2 p^{6}, 3 s^{2}; 3 s^{2} 3 p^{6}, 4 s^{2}$ . Given electronic configuration represents which group?

The correct option is A
Group II A

The 's' is the outermost orbital in this case and it contains two valence electrons. Thus the given electronic configuration belongs to Group II A.