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प्रश्न
Give the formula of the following gas:
Ammonia
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उत्तर
Ammonia — NH3
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संबंधित प्रश्न
Give two examples of the following :
Solid + Solid mixture
The anion of an element has ______.
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Match the symbols of metallic elements – with their correct combining power or capacity.
(a) K
(b) Zn
(c) Al
(d) Na
(e) Ca
Combining power or capacity – A : 3 ; B : 2 ; C : 1. (positive valencies)
Give the symbol of the following element:
Sulphate
Give the formula of the following gas:
Nitrogen
State the valency of the following metallic element and write symbol with the valency
Calcium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
write symbol with the variable valency
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Phosphate
______ of some elements are derived from Latin or Greek names of the elements.
