Question

classify the elements from atomic number 1 to 20 solids and gases​

Answer 1

These are the first 20 elements, listed in order:

1 - H - Hydrogen

2 - He - Helium

3 - Li - Lithium

4 - Be - Beryllium

5 - B - Boron

6 - C - Carbon

7 - N - Nitrogen

8 - O - Oxygen

9 - F - Fluorine

10 - Ne - Neon

11 - Na - Sodium

12 - Mg - Magnesium

13 - Al - Aluminum

14 - Si - Silicon

15 - P - Phosphorus

16 - S - Sulphur

17 - Cl - Chlorine

18 - Ar - Argon

19 - K - Potassium

20 - Ca - Calcium