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NYS Chemistry Regents Review Practice - Chemical Bonding - Question 10 |
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Practice Questions
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10. A barium atom attains a stable electron configuration when it bonds with:
A) 1 chlorine atom
B) 1 sodium atom
C) 2 chlorine atoms
D) 2 sodium atoms
Correct Answer: Option C - 2 chlorine atoms
1 atom of Barium atom has 2 valence electrons and 1 atom of chlorine has 7 valence electrons. Hence, for Barium to stabilize it gives 2 electrons to 2 atoms of chlorine forming an ionic bond with, 1 barium cation and 2 chlorine anions. Hence, option A is incorrect and option C is correct.
Sodium also has 1 valence electron and the energies of both sodium and barium are insufficient to form a bond. Hence, options B and D are incorrect.
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