Question

question 36 (2 points)
how many electrons are in the highest occupied energy level of a neutral chlorine atom?
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question 37 (2 points)
how many electrons are in the highest occupied energy level of a neutral strontium atom?
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question 38 (2 points)
how many electrons are in the highest occupied energy level of copper?
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question 39 (2 points)
how many electrons are there in the highest occupied energy level of atoms in group 5a elements?
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Explanation:

Question 36

Step1: Determine the electron configuration of chlorine

Chlorine has an atomic number of 17. Its electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\). The highest occupied energy level is the third energy level (\(n = 3\)), which has \(2+5=7\) electrons.

Question 37

Step1: Determine the electron configuration of strontium

Strontium has an atomic number of 38. Its electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}\). The highest occupied energy level is the fifth energy level (\(n = 5\)), which has \(2\) electrons.

Question 38

Step1: Determine the electron configuration of copper

Copper has an atomic number of 29. Its electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}\). The highest occupied energy level is the fourth energy level (\(n = 4\)), which has \(1\) electron.

Question 39

Step1: Recall the group - electron relationship

Elements in Group 5A (N, P, As, Sb, Bi) have an electron configuration with \(ns^{2}np^{3}\) in their highest occupied energy level. So the number of electrons in the highest occupied energy level is \(2 + 3=5\).

Answer:

Question 36: \(7\)
Question 37: \(2\)
Question 38: \(1\)
Question 39: \(5\)