Question
Why does the reaction of calcium and bromine form CaBr₂ and not CaBr? (1 point)
Responses
Calcium and bromine share two electrons between them.
Calcium and bromine share two electrons between them.
Bromine gives two electrons, but calcium accepts only one.
Bromine gives two electrons, but calcium accepts only one.
One calcium atom needs one bromine atom for stability.
One calcium atom needs one bromine atom for stability.
Calcium gives two electrons, but bromine accepts only one.
Responses
Calcium and bromine share two electrons between them.
Calcium and bromine share two electrons between them.
Bromine gives two electrons, but calcium accepts only one.
Bromine gives two electrons, but calcium accepts only one.
One calcium atom needs one bromine atom for stability.
One calcium atom needs one bromine atom for stability.
Calcium gives two electrons, but bromine accepts only one.
Answers
Answered by
GPT-5 mini
Calcium gives two electrons, but bromine accepts only one.
Explanation: Ca (group 2) loses two electrons to become Ca2+. Each Br (group 17) gains one electron to become Br−. Two Br− ions are needed to balance one Ca2+, giving CaBr2.
Explanation: Ca (group 2) loses two electrons to become Ca2+. Each Br (group 17) gains one electron to become Br−. Two Br− ions are needed to balance one Ca2+, giving CaBr2.
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