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Idea of Hybridisation

In the electr...

Question

In the electronic configurations of elements A and B are $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$ and $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{4}$ respectively, then the formula of the compound formed by the combination of these elements will be

A B

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A B_{3}

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A B_{2}

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A_{2} B

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Solution

The correct option is D $A_{2} B$
Electronic configuration of A is $1 S^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
Electronic configuration of B is $1 S^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}$
Valency of A =1
Valency of B $= 8 - 6 = 2$
$\therefore The compound formed by A & B is

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Similar questions

L, P, Q

R

L (l s^{2}, 2 S^{2}, 2 p^{4}); P (l s^{2}, 2 s^{2}, 2 P^{6}, 3 s^{1})

Q (l s^{2}, 2 s^{2} 2 P^{6}, 3 s^{2} 3 p^{5})

R (l s^{2}, 2 s^{2} 2 P^{6}, 3 s^{2})

X = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

Y = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}

X

Y

X = 2, 8, 2

Y = 2, 8, 7

Question 16

The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations.

A $1 s^{2}$ $2 s^{2}$ $2 p^{6}$

B $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{3}$

C $1 s^{2}$ $2 p^{6}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$

The molecular formula of the compound formed from B and C will be

(a) BC

(b) $B_{2} C$

(d) $B C_{3}$

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