Question

What is the valence and valence electrons, atomic number, and mass number of the electronic configuration of the first twenty elements?

Answer 1

Here is the electronic configuration, valence, valence electrons, atomic number, and mass number of the first twenty elements:

1. Hydrogen (H) Electronic Configuration: 1s^1 Valence: 1 Valence Electrons: 1 Atomic Number: 1 Mass Number: 1

2. Helium (He) Electronic Configuration: 1s^2 Valence: 0 Valence Electrons: 2 Atomic Number: 2 Mass Number: 4

3. Lithium (Li) Electronic Configuration: 1s^2 2s^1 Valence: 1 Valence Electrons: 1 Atomic Number: 3 Mass Number: 7

4. Beryllium (Be) Electronic Configuration: 1s^2 2s^2 Valence: 2 Valence Electrons: 2 Atomic Number: 4 Mass Number: 9

5. Boron (B) Electronic Configuration: 1s^2 2s^2 2p^1 Valence: 3 Valence Electrons: 3 Atomic Number: 5 Mass Number: 11

6. Carbon (C) Electronic Configuration: 1s^2 2s^2 2p^2 Valence: 4 Valence Electrons: 4 Atomic Number: 6 Mass Number: 12

7. Nitrogen (N) Electronic Configuration: 1s^2 2s^2 2p^3 Valence: 5 Valence Electrons: 5 Atomic Number: 7 Mass Number: 14

8. Oxygen (O) Electronic Configuration: 1s^2 2s^2 2p^4 Valence: 6 Valence Electrons: 6 Atomic Number: 8 Mass Number: 16

9. Fluorine (F) Electronic Configuration: 1s^2 2s^2 2p^5 Valence: 7 Valence Electrons: 7 Atomic Number: 9 Mass Number: 19

10. Neon (Ne) Electronic Configuration: 1s^2 2s^2 2p^6 Valence: 0 Valence Electrons: 8 Atomic Number: 10 Mass Number: 20

11. Sodium (Na) Electronic Configuration: 1s^2 2s^2 2p^6 3s^1 Valence: 1 Valence Electrons: 1 Atomic Number: 11 Mass Number: 23

12. Magnesium (Mg) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 Valence: 2 Valence Electrons: 2 Atomic Number: 12 Mass Number: 24

13. Aluminum (Al) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^1 Valence: 3 Valence Electrons: 3 Atomic Number: 13 Mass Number: 27

14. Silicon (Si) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^2 Valence: 4 Valence Electrons: 4 Atomic Number: 14 Mass Number: 28

15. Phosphorus (P) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^3 Valence: 5 Valence Electrons: 5 Atomic Number: 15 Mass Number: 31

16. Sulfur (S) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^4 Valence: 6 Valence Electrons: 6 Atomic Number: 16 Mass Number: 32

17. Chlorine (Cl) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^5 Valence: 7 Valence Electrons: 7 Atomic Number: 17 Mass Number: 35.5

18. Argon (Ar) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 Valence: 0 Valence Electrons: 8 Atomic Number: 18 Mass Number: 40

19. Potassium (K) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 Valence: 1 Valence Electrons: 1 Atomic Number: 19 Mass Number: 39

20. Calcium (Ca) Electronic Configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 Valence: 2 Valence Electrons: 2 Atomic Number: 20 Mass Number: 40