Question

Do it pls asap I need​

Answer 1

Explanation:

1- Phosphorous

2- Hydrogen

3- Chlorine

4- Addled

5- Beryllium

6- Potassium

7- Neon

8- Oxygen

9- Sodium

10- Lead

11- Magnesium

12- Flourine

13- Argon

14- Silicon

15- Carbon

16- Nitrogen

17- Helium

18- Nickel

19- Boron

20- Aluminium