chem question?

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How many valence electrons does each of the following atoms possess?

(b) magnesium, Z = 12
(c) boron, Z = 5
(d) lithium, Z = 3

2007-04-18 19:50:12 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

3 answers

well, magnesium is in group 2, boron is in group 3, and lithium is in group 1...so magnesium has 2 valence electrons, boron has 3, and lithium has 1. The group number indicates the number of valence electrons in that particular group.

Hope this helps =)

2007-04-18 23:35:36 · answer #1 · answered by ♥ Victory ♥ 3 · 0⤊ 0⤋

Look at what Group they are in: 2, 3 and 1.

2007-04-18 19:54:11 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋

2
3
1

2007-04-18 20:00:00 · answer #3 · answered by 121221 2 · 0⤊ 0⤋