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प्रश्न
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
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उत्तर
It is a series of metals arranged according to their reactivity in which the most reactive metal i.e. potassium is at the top of the series and the least reactive metal i.e. gold is at the bottom.
The most reactive metal is Na.
The less reactive metals are Zn, Fe, Pb.
The least reactive metals are Ag, Cu.
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संबंधित प्रश्न
Which particular atom of the above element is used for this purpose ?
Give two examples of the following:
Solid + Liquid mixture
State the type of element for the following:
Neon
Give the symbol of the following element:
Sulphate
Give the formula of the following gas:
Hydrogen chloride
State the valency of the following metallic element and write symbol with the valency
Magnesium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
write symbol with the variable valency
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
How many elements are known at present?
Write a note on Greem symbols.
