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Question

The principal quantum number of the valence electrons in a atom of lead is

A. 2
B. 3
C. 4
D. 5
E. 6
17 years ago

Answers

Michael
The principal quantum number corresponds to the number of the element's period. Lead is in the sixth period, so its quantum number is 6.
17 years ago
Marley
The energy level of the valence electrons of every element is the same as its period in the periodic table.
So in this case Lead = 6 (E.)
11 years ago

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