Calcium ( Ca ) has two valence electrons and bromine ( Br ) has seven valence electrons. What is the chemical formula of calcium bromide, the product of a chemical reaction of calcium and bromide?(1 point) Responses CaBr C a B r CaBr2 C a B r sub 2 Ca2Br7 C a sub 2 B r sub 7 Ca7Br2

Answer 1

The chemical formula of calcium bromide, which is formed from the reaction of calcium (Ca) and bromine (Br), is \( \text{CaBr}_2 \).

Calcium has a +2 charge as it loses its two valence electrons, and bromine has a -1 charge. To balance the charges, two bromine atoms are needed for each calcium atom. Therefore, the correct answer is \( \text{CaBr}_2 \).