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प्रश्न
What do the following symbol stand for?
H2
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उत्तर
H2 stands for one molecule of hydrogen.
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संबंधित प्रश्न
State whether the following statement is true or false:
The symbol of element cobalt is CO.
What is meant by atomicity? Name the diatomic element.
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Give the symbol and the number of atoms of the following elements present in water.
Give the symbol and the number of atoms of the following elements present in zinc chloride.
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)
State what is meant by the term ‘activity series of metals’.
Give the formula of the following gas:
Nitric 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).
Nitrate
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).
Nitride
