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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 ?
पर्याय
CO
AL
He
So
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उत्तर
He
He is the correct symbol of helium.
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संबंधित प्रश्न
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Na1+ Cl1-
In the chemical word equation – Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
The molecular equation is :
Zn + H2SO4 → ZnSO4 + H2[g].
State what [g] represents.
Give the symbol of the following element:
Mercury
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
Write the radical of the following valency:
Zinc
Write the chemical formula of the following:
magnesium sulphate
Write the chemical formula of the following:
calcium carbonate
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
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).
Zincate
