5.WRITE THE VALENCY OF THE FOLLOWING ELEMENTS.
(I) Sodium (II) Magnesium (III)Iron (IV) Sulphur (V)Carbon
6.WRITE THE ATOMICITY AND
ELEMENTS PRESENT IN THE FOLLOWING COMPOUNDS.
(I) Common salt (II)Water (III) Carbon dioxide (IV) Calcium Oxide (V) Magnesium Oxide.
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5. Valency of Sodium(Na) - 1
Magnesium - 2
Calcium - 2
Sulphur - 3
Carbon - 4
6. Common salt - NaCl elements present - Sodium, Chlorine
atomicity - divalent
Water - H₂O elements present are Hydrogen and Oxygen
atomicity - divalent
Carbon dioxide - CO₂ elements- Carbon and oxygen
atomicity - divalent
Calcium Oxide - CaO elements - Calcium and oxygen
atomicity - divalent
Magnesium Oxide - MgO elements - Magnesium and oxygen
atomicity - divalent.
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