Potassium (K) has an atomic number of 19. It often forms an ion by losing 1 electron. How many electrons would the ion have?A.+1B.-1C.18D.20
Question
Potassium (K) has an atomic number of 19. It often forms an ion by losing 1 electron. How many electrons would the ion have?A.+1B.-1C.18D.20
Solution
The atomic number of an element represents the number of protons in its nucleus, and in a neutral atom, the number of protons is equal to the number of electrons. So, a neutral atom of Potassium (K) has 19 electrons.
When Potassium forms an ion by losing 1 electron, the number of electrons would be 19 (original number of electrons) - 1 (lost electron) = 18 electrons.
So, the answer is C.18.
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