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प्रश्न
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as
follows. Which symbol is the correct one ?
विकल्प
CO
AL
He
So
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उत्तर
He
He is the correct symbol of helium.
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संबंधित प्रश्न
Give the symbol of the following element:
Carbon
Give the symbol of the following element:
Lead
State the type of element for the following:
Lead
Write the radical of the following valency:
Iodine
State the valency of the following metallic element and write symbol with the valency
Magnesium
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).
Oxide
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).
Sulphite
What does the symbol '→' present in a chemical equation, mean?
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
How many elements are known at present?
