Question

Q3-(4)- If an element has seven valence electrons it is likely to be a ______ .

Answer 1

Step 1: Introduction:

1. An element always follows the octet rule, that is, it always tries to attain the electronic configuration as its nearest noble gas.
2. Metals have 1,2 or 3 electrons in their valence shell, so they can easily attain the nearest noble gas configuration by losing an electron.
3. Non-metals have 5,6 or 7 electrons in their valence shell, so they can easily achieve the nearest noble gas configuration by gaining an electron.

Step 2: Explanation:

1. The element which has 7 electrons in its valence shell can attain the nearest noble gas configuration by gaining 1 electron. Hence, it is non-metal.
2. For example, Fluorine and Chlorine have seven valence shell electrons and they are non-metals.

Conclusion: If an element has seven valence electrons it is likely to be a Non-metals