Question

First 20 elements in Mendeleev's periodic table​

Answer 1

Answer:

1. Hydrogen
2. Lithium
3. Beryllium
4. Boron
5. Corbon
6. Nitrogen
7. Oxygen
8. Fluorine
9. Sodium
10. Magnesium
11. Aluminum
12. Silicon
13. Phosphorus
14. Sulphur
15. Chlorine
16. Potassium
17. Calcium
18. Scandium
19. Titanium
20. Vanadium

Answer 2

Explanation:

• Hydrogen - H
• Lithium - Li
• Beryllium - Be
• Boron - B
• Carbon - C
• Nitrogen - N
• Oxygen - O
• Fluorine - F
• Sodium - Na
• Magnesium - Mg
• Aluminium - Al
• Silicon - Si
• phosphorus - P
• Sulphur - S
• Chlorine - Cl
• Potassium - K
• Calcium - Ca
• Scandium - Sc
• Titanium - Ti
• Vanadium - V

hope it helps........