If the electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{2} 4 s^{2}$ , the four electrons involved in chemical bond formation will be:

3 p^{6}

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3 p^{6}, 4 s^{2}

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3 p^{6}, 3 d^{2}

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3 d^{2}, 4 s^{2}

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Solution

The correct option is B $3 d^{2}, 4 s^{2}$
Electrons from outermost shells $n s$ and $(n - 1) d$ take part in bond formation for transition elements,
see the image for more clarification,
So the correct option is [D].

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Question 12

If the electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{2} 4 s^{2}$ the four electrons involved in chemical bond formation will be

(a) $3 p^{6}$

(b) $3 p^{6}, 4 s^{2}$

(d) $3 d^{2}, 4 s^{2}$

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If the electronic configuration of an element is 1s22s22p63s23p63d24s2, the four electrons involved in chemical bond formation will be:

The correct option is B 3d2,4s2Electrons from outermost shells ns and (n−1)d take part in bond formation for transition elements,see the image for more clarification,So the correct option is [D].

If the electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{2} 4 s^{2}$ , the four electrons involved in chemical bond formation will be:

The correct option is B $3 d^{2}, 4 s^{2}$
Electrons from outermost shells $n s$ and $(n - 1) d$ take part in bond formation for transition elements,
see the image for more clarification,
So the correct option is [D].