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Chemical Reactivity

An element ...

Question

An element $Z$ has atomic number $16$ . Answer the following questions on $Z$ :
State the formula between $Z$ and Hydrogen?

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Solution

The atomic number of $Z$ is $16$ . Its electronic configuration is $2, 8, 6.$ The valency of $Z$ is $2$ whereas the valency of $H$ is $1$ . Hence to satisfy the valency of $Z$ , 2 hydrogen atoms are needed. So, $H_{2} Z$ .

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