Question

An element with the general electron configuration for its outermost electrons of ns2np1 would be in which element group? select one:
a. 2a
b. 3a
c. 4a
d. 5a
e. 8a

Answer 1

if I'm not mistaken your answer is d. :)

Answer 2

An element with the general electron configuration for its outermost electrons of ns2np1 would be in the element group - b. 3a.

The electron configuration of the outermost electrons, that is the number of valence electrons. In the given atom looks like this -

$ns^2np^1$

• it is given that it has 3 valence electrons in its outer-most orbitals.

We know that,

• A Number of valence electrons in an atom = group number.
• 3 = group 3 and as it has 1 electron in its p-block it is in the 3a or 13th group in the periodic table.

Thus, An element with the general electron configuration for its outermost electrons of ns2np1 would be in the element group - b. 3a.

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