Q. Relative atomic mass for chlorine is

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Q. The mole of a substance is the relative atomic mass or relative molecular mass in terms of

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Q. The instrument which is used to find relative atomic mass of each isotope in an element is called

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Q. The second principal quantum shell can accommodate the number of electrons in numbers

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Q. The electrons (e⁻) of the quantum shells, which are further away from nucleus retain attraction, which is

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Q. The region outside nucleus where electrons (e⁻) revolve is called

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Q. The presence of electrons is shown by three-dimensional shape of orbit with

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Q. The first element whose electron lies in 3d sub-shell is

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Q. The region around the nucleus which can be filled with one or two electrons is known as

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Q. The shape of s-orbital is

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Q. The electronic configuration of atom which possess lowest energy is the most

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Q. The name given to sub-shells are s-sharp, p-principal and d for

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Q. Louis de Broglie suggested that electrons behaved like

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Q. Each principal quantum shell consists of different numbers of

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Q. Each sub-shell has at least one or two

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Q. The filling of sub-shells are dependent upon

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Q. The letters denote sub-shells are

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Q. Configuration of 18 electrons (e⁻) in third principal quantum level in s=2, p=8 and d will be

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Q. Elements with more than 57 electrons require

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Q. The concept of Avogadro's number was given by

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