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प्रश्न
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
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उत्तर
- Cobalt – Co
- Carbon – c
- Aluminium – A1
- Helium – He (correct)
- Sodium – Na
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संबंधित प्रश्न
Give two examples of the following :
Solid + Solid mixture
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
State the type of element for the following:
Zinc
State the type of element for the following:
Aluminium
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Give the symbol of the following element:
Magnesium
Write the radical of the following valency:
Sulphate
Select the correct answer from the choice in the bracket.
The formula of caustic soda.
State the valency of the following metallic element and write symbol with the valency
Zinc
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).
Carbonate
