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प्रश्न
State which element exists in the highest percentage in human body.
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उत्तर
Oxygen (O) – 65%
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संबंधित प्रश्न
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
State which element exists in the highest percentage in earth’s crust.
Give the symbol of the following element:
Neon
Write the radical of the following valency:
Iodine
Write the chemical formula of the following:
calcium sulphide
Give the formula of the following gas:
Hydrogen chloride
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).
Carbonate
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 ________.
What does the symbol '(l)' present in a chemical equation, mean?
