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प्रश्न
State which element exists in the highest percentage in atmosphere.
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उत्तर
Nitrogen (N) — 78%
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संबंधित 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 ?
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
Write the radical of the following valency:
Sulphite
Write the radical of the following valency:
Bromine [Bromide]
Write the chemical formula of the following:
magnesium sulphate
Write the chemical formula of the following:
zinc oxide
Give the formula of the following gas:
Nitrous oxide
Define the term ‘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).
Nitride
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt and O; the element which forms a polyatomic molecule is ________ and which is liquid at room temperature is ________.
