Answer:
Ca and Br
Explanation:
i took an online test and this was the answer
A salt is formed when a metal combines with a nonmetal hence the pair that will form a salt is Ca and Br.
A salt is an ionic substance. An ionic substance is formed when a metal donates an electron to a nonmetal in an ionic bond. Hence, we must look out for the pair that consists of a metal and a nonmetal.
Closely examining the options, we can see that only the pair involving Ca and Br is comprised of a metal and a nonmetal hence they can form a salt.
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