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Chapter 6: Q58E (page 336)

Question:Which of the following atoms contains only three valence electrons: Li, B, N, F, Ne?

Short Answer

Expert verified

Boron contains only 3 valence electrons.

Step by step solution

01

checking if Li and B have just three valence electrons or not  

Li has 1 electron in its 2s orbital. so, it has 1 valence electron. Boron has 2 electrons in 2s orbital, 1 electron in 3p. that accounts for a total of 3 valence electrons.

02

checking if N, F, and Ne have just three valence electrons or not  

N has a total of 5 valence electrons. F has a total of 7 valence electrons. Neon is an inert gas of group 18 and it has filled s and p orbitals, hence a total of 8 valence electrons.

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Identify the subshell in which electrons with the following quantum numbers are found:

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(b)n= 4,l= 2

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See all solutions

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