Multiple Choice
How many valence electrons does bromine (Br), a group 17 halogen, have?
2
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9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
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In the simplified valence-electron model for main-group elements, how many valence electrons does a calcium (Ca) atom have?
A
6
B
2
C
8
D
1
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