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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Q. Avogadro's number is the collection of particles

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Q. Noble gases have complete

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Q. P block elements have electrons in their outermost shell

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Q. Octet rule is defined as an atom having electrons

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Q. The outermost shell of carbon consists of electron

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Q. The energy of orbital close to nucleus is

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Q. The outermost electron of nitrogen is present in

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