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प्रश्न
Write the chemical formula of the following:
magnesium oxide
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उत्तर
MgO
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संबंधित प्रश्न
Give two examples of the following :
Solid + Solid mixture
The symbol of a metal element which is used in making thermometers is :
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of
an element as its symbol, was :
Give the names and symbols of the first twenty elements of the periodic table.
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:
Aluminium
Write the radical of the following valency:
Sulphate
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable 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).
Oxide
