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प्रश्न
State what is meant by the term ‘activity series of metals’.
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उत्तर
The positive of metals in the decreasing order of their reactivity is called ‘activity series of metals.’
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संबंधित प्रश्न
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
State what a chemical formula denotes.
State the type of element for the following:
Xenon
Give the symbol of the following element:
Nitrate
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency
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).
Sulphite
Name three metals whose symbols are derived from the first letter of the name of the element.
Write the symbols for the following elements and classify them as solid, liquid and gas. Aluminum, Carbon, Chlorine, Mercury, Hydrogen and Helium
