What will be the valency of an element having atomic number (Z)=7?

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Solution

The correct option is D
3

If Z = 7, the electronic configuration is given by 2, 5.
Hence, it has 5 electrons in the outer most shell. To complete its octet, it requires 3 electrons to attain stable state therefore, its valency is 3.

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What will be the valency of an element having atomic number (Z)=7?

The correct option is D 3 If Z = 7, the electronic configuration is given by 2, 5. Hence, it has 5 electrons in the outer most shell. To complete its octet, it requires 3 electrons to attain stable state therefore, its valency is 3.

The correct option is D
3

If Z = 7, the electronic configuration is given by 2, 5.
Hence, it has 5 electrons in the outer most shell. To complete its octet, it requires 3 electrons to attain stable state therefore, its valency is 3.