Chemistry, asked by cleopatra, 1 year ago

frist 20 elements with their valency and atomic weight

Answers

Answered by amruthadeshpande

ELEMENTS VALENCY AT.WT
HYDROGEN       1 1
HELIUM    0    4
LITHIUM        1 7
BERYLLIUM 2 9
BORON     3 11
CARBON       4 12
NITROGEN     5 14
OXYGEN    2    16
FLUORINE     1 19
NEON    0 20
SODIUM    1 23
MAGNESIUM    2 24
ALUMINIUM    3 27
SILICON    4 28
PHOSPHORUS 5 31
SULPHUR          6 32
CHLORINE    7 35.5
ARGON    0 40
POTASSIUM    1 39
CALCIUM    2 40

Answered by pandukasam

ELEMENT: VALENCY: ATOMIC WEIGHT :
Hydrogen 1 1
Helium 0 4
Lithium 1 7
Beryllium 2 9
Boron 3 11
Carbon 4 12
Nitrogen 3 14
Oxygen 2 16
Fluorine 1 19
Neon 0 20
Sodium 1 23
Magnesium 2 24
Aluminium 3 27
Silicon 4 28
Phosphorous 3 31
Sulfur 2 32
Chlorine 1 35.5
Argon 0 40
Potassium 1 39
Calcium 2 40

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