Question

2. Name any eight elements from the first 20 elements of the periodic table with their symbols, for example – Helium – He (Please note that you should not add Helium to your answer)

Answer 1

Answer:

Pls refer above image

Explanation:

I had all written 20 elements and their valency before only.

Hope it's helpful.

And sorry to add helium.

Answer 2

Answer:

1. hydrogen- H

2. lithium- Li

3. beryllium-Be

4. boron-B

5. carbon-c

6. nitrogen-N

7. oxygen-O

8. fluorine-F