8
lesson pretestMultiple Choice

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Question 8 • Chemistry

Each atom of an element has these electron configuration. 1 s squared 2 s squared 2 p to the 6th power 3 s squared 3 p to the 6th power 4 s squared 3 d to the 10th power 4 p to the 6th power 5 s squared 4 d to the 10th power 5 p to the 5th power What is the name of the element?

Answer
A
tellurium
B
iodine
C
xenon
D
bromine

Explanation

The configuration ends in 5p⁵, which means the atom has five electrons in the 5p subshell. Counting all the electrons gives 53, the atomic number of iodine. Therefore, the element is iodine.

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