15. What is the valence electron of the atom with electronic configuration of: 1s?2s?2p°3s? а. 3 b. 2 С. 6 d. 4 B. Identify the number of valence electrons based on their electronic configuration. Symbol Electron Configuration # of Valence Electrons 1. H 1s' 2. Не 1s2 3. Li 1s 2s1 4. Be 1s 2s 5. B 1s2s2 2p' 6. C 1s 2s? 2p2

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15. What is the valence electron of the atom with electronic configuration of: 1s22s?2p°3s?
а. 3
b. 2
C. 6
d. 4
B. Identify the number of valence electrons based on their electronic configuration.
Symbol
Electron Configuration
# of Valence Electrons
1.
H.
1s1
Не
1s2
Li
1s 2s1
Be
1s 2s
В
1s22s2 2p1
C
1s 2s? 2p2
2.
3456
Transcribed Image Text:15. What is the valence electron of the atom with electronic configuration of: 1s22s?2p°3s? а. 3 b. 2 C. 6 d. 4 B. Identify the number of valence electrons based on their electronic configuration. Symbol Electron Configuration # of Valence Electrons 1. H. 1s1 Не 1s2 Li 1s 2s1 Be 1s 2s В 1s22s2 2p1 C 1s 2s? 2p2 2. 3456
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