Question

Prediodic Table for first 20 elements​

Answer 1

AnswerThe first 20 elements of the periodic table have been tabulated below, along with their symbols and atomic numbers.

Atomic Number Element Symbol

1 Hydrogen H

2 Helium He

3 Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminium Al

14 Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20 Calcium Ca

Answer 2

Answer:

Hydrogen - H.

Hydrogen - H.Helium - He.

Hydrogen - H.Helium - He.Lithium - Li.

Hydrogen - H.Helium - He.Lithium - Li.Beryllium - Be.

Hydrogen - H.Helium - He.Lithium - Li.Beryllium - Be.Boron - B.

Hydrogen - H.Helium - He.Lithium - Li.Beryllium - Be.Boron - B.Carbon - C.

Hydrogen - H.Helium - He.Lithium - Li.Beryllium - Be.Boron - B.Carbon - C.Nitrogen - N.

Hydrogen - H.Helium - He.Lithium - Li.Beryllium - Be.Boron - B.Carbon - C.Nitrogen - N.Oxygen - O.

florine

neon

sodium

magnisium

aluminium

silicon

phosphorus

Sulphur

chlorine

argon

potassium

calsium

Explanation:

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