Question

write atomic number and electronic configuration from 1 to 20 elements​

Answer 1

Atomic Number Name of the Element Electronic Configuration

1 Hydrogen (H) 1s1

2 Helium (He) 1s2

3 Lithium (Li) [He] 2s1

4 Beryllium (Be) [He] 2s2

5 Boron (B) [He] 2s2 2p1

6 Carbon (C) [He] 2s2 2p2

7 Nitrogen (N) [He] 2s2 2p3

8 Oxygen (O) [He] 2s2 2p4

9 Fluorine (F) [He] 2s2 2p5

10 Neon (Ne) [He] 2s2 2p6

11 Sodium (Na) [Ne] 3s1

12 Magnesium (Mg) [Ne] 3s2

13 Aluminium (Al) [Ne] 3s2 3p1

14 Silicon (Si) [Ne] 3s2 3p2

15 Phosphorus (P) [Ne] 3s2 3p3

16 Sulphur (S) [Ne] 3s2 3p4

17 Chlorine (Cl) [Ne] 3s2 3p5

18 Argon (Ar) [Ne] 3s2 3p6

19 Potassium (K) [Ar] 4s1

20 Calcium (Ca) [Ar] 4s2

21 Scandium (Sc) [Ar] 3d1 4s2

22 Titanium (Ti) [Ar] 3d2 4s2

23 Vanadium (V) [Ar] 3d3 4s2

24 Chromium (Cr) [Ar] 3d5 4s1

25 Manganese (Mn) [Ar] 3d5 4s2

26 Iron (Fe) [Ar] 3d6 4s2

27 Cobalt (Co) [Ar] 3d7 4s2

28 Nickel (Ni) [Ar] 3d8 4s2

29 Copper (Cu) [Ar] 3d10 4s1

30 Zinc (Zn) [Ar] 3d10 4s2

Answer 2

❥︎Aɴsᴡᴇʀ

1) Hydrogen (H) 1s1

2) Helium (He) 1s2

3) Lithium (Li) [He] 2s1

4)Beryllium (Be) [He] 2s2

5)Boron (B) [He] 2s2 2p1

6)Carbon (C) [He] 2s2 2p2

7)Nitrogen (N) [He] 2s2 2p3

8) Oxygen (O) [He] 2s2 2p4

9)Fluorine (F) [He] 2s2 2p5

10) Neon (Ne) [He] 2s2 2p6

11)Sodium (Na) [Ne] 3s1

12)Magnesium (Mg) [Ne] 3s2

13)Aluminium (Al)[Ne] 3s2 3p1

14)Silicon (Si) [Ne] 3s2 3p2

15)Phosphorus (P) [Ne] 3s2 3p3

16) Sulphur (S) [Ne] 3s2 3p4

17) Chlorine (Cl) [Ne] 3s2 3p5

18)Argon (Ar) [Ne] 3s2 3p6

19) Potassium (K) [Ar] 4s1

20)Calcium (Ca) [Ar] 4s2

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