Question

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

Answer 1

Sure! Here are the electronic configurations, valence electrons, atomic numbers, and mass numbers for the first twenty elements:

1. Hydrogen (H): 1s¹ | Valence: 1 | Atomic Number: 1 | Mass Number: 1
2. Helium (He): 1s² | Valence: 2 | Atomic Number: 2 | Mass Number: 4
3. Lithium (Li): 1s² 2s¹ | Valence: 1 | Atomic Number: 3 | Mass Number: 7
4. Beryllium (Be): 1s² 2s² | Valence: 2 | Atomic Number: 4 | Mass Number: 9
5. Boron (B): 1s² 2s² 2p¹ | Valence: 3 | Atomic Number: 5 | Mass Number: 11
6. Carbon (C): 1s² 2s² 2p² | Valence: 4 | Atomic Number: 6 | Mass Number: 12
7. Nitrogen (N): 1s² 2s² 2p³ | Valence: 5 | Atomic Number: 7 | Mass Number: 14
8. Oxygen (O): 1s² 2s² 2p⁴ | Valence: 6 | Atomic Number: 8 | Mass Number: 16
9. Fluorine (F): 1s² 2s² 2p⁵ | Valence: 7 | Atomic Number: 9 | Mass Number: 19
10. Neon (Ne): 1s² 2s² 2p⁶ | Valence: 8 | Atomic Number: 10 | Mass Number: 20
11. Sodium (Na): 1s² 2s² 2p⁶ 3s¹ | Valence: 1 | Atomic Number: 11 | Mass Number: 23
12. Magnesium (Mg): 1s² 2s² 2p⁶ 3s² | Valence: 2 | Atomic Number: 12 | Mass Number: 24
13. Aluminum (Al): 1s² 2s² 2p⁶ 3s² 3p¹ | Valence: 3 | Atomic Number: 13 | Mass Number: 27
14. Silicon (Si): 1s² 2s² 2p⁶ 3s² 3p² | Valence: 4 | Atomic Number: 14 | Mass Number: 28
15. Phosphorus (P): 1s² 2s² 2p⁶ 3s² 3p³ | Valence: 5 | Atomic Number: 15 | Mass Number: 31
16. Sulfur (S): 1s² 2s² 2p⁶ 3s² 3p⁴ | Valence: 6 | Atomic Number: 16 | Mass Number: 32
17. Chlorine (Cl): 1s² 2s² 2p⁶ 3s² 3p⁵ | Valence: 7 | Atomic Number: 17 | Mass Number: 35.5
18. Argon (Ar): 1s² 2s² 2p⁶ 3s² 3p⁶ | Valence: 8 | Atomic Number: 18 | Mass Number: 40
19. Potassium (K): 1s²