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Mathematics, 15.10.2019 23:30 daisyperez1

An atom has the following electron configuration.

1s22s22p63s23p64s23d3

how many valence electrons does this atom have?

a. 2

b. 3

c. 5

d. 11

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Answers: 3
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An atom has the following electron configuration.

1s22s22p63s23p64s23d3

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