Question

for 7th standard how many elements should we learn in periodic table

Answer 1

20 elements

1. Hydrogen

2. Helium  

3. Lithium

4. Beryllium

5. Boron

6. Carbon

7. Nitrogen

8. Oxygen

9. Fluorine

10. Neon

11. Sodium

12. Magnesium

13. Aluminum

14. Silicon

15. Phosphorus

16. Sulphur

17. Chlorine

18. Argon

19. Potassium

20. Calcium