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Chemistry, 28.12.2019 21:31 Haneendye123

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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An atom has the following electron configuration.

1s22s22p63s23p64s23d3

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