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प्रश्न
The atoms of which of the following pair of elements are most likely to exist in free state ?
पर्याय
hydrogen and helium
argon and carbon
neon and nitrogen
helium and neon
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उत्तर
helium and neon
Atoms of helium and neon exist in a free state because they are inert gases and chemically inactive.
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संबंधित प्रश्न
Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate
Define: Compounds
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Give the symbol of the following element:
Carbonate
Write the radical of the following valency:
Chlorine [Chloride]
Write the radical of the following valency:
Aluminium
Write the radical of the following valency:
Bromine [Bromide]
State the valency of the following metallic element and write symbol with the valency
Sodium
What does the symbol '(g)' present in a chemical equation, mean?
What is the expansion of IUPAC.
