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Writing Chemical Formulae

In the formul...

Question

In the formula $C a B r_{2}$ what does Ca stand for and what is its valency?

A

Calcium +1

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B

calcium -1

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C

Calcium +2

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D

Calcium -2

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Solution

The correct option is C
Calcium +2

The word equation will be be written as:
Sodium hydroxide + calcium bromide $\to$ Calcium hydroxide + sodium bromide.
Ca stands for calcium. From the formula $C a B r_{2}$ it is evident that the valency of calcium is 2 and the valency of bromine is 1.

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