Chemistryhard · Past Paper
How many electrons are in the outermost shell of an element with atomic number 19?
A1
B8
C9
D2
✓ Correct Answer: A — 1
Potassium (Z=19) has a configuration of 2, 8, 8, 1.
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✓ Correct Answer: A — 1
Potassium (Z=19) has a configuration of 2, 8, 8, 1.
Share this question