Chemistry, asked by nithyaprabhu984, 1 month ago

first 20 elements with valency symbol electrons and E.C

Answers

Answered by KrithikaQueen
0

Explanation:

compound of hydrogen and carbon, such as any of those which are the chief components of petroleum and natural gas.

"the rain is rich in benzene and hydrocarbons"

Answered by Tan78
0

Answer:

Element Symbol Atomic Number Valency

Hydrogen H 1

Helium He 2

Lithium Li 3

Beryllium Be 4

Boron B 5

Carbon C 6 4

Nitrogen N 7

Oxygen O 8

Fluorine F 9

Neon Ne 10

Sodium Na 11

Magnesium Mg 12

Aluminum Al 13

Silicon Si 14

Phosphorus P 15

Sulphur S 16

Chlorine Cl 17

Argon Ar 18

Potassium K 19

Calcium Ca 20

Explanation:

hope it helps you

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