Q. Purpose of a mass spectrometer is to

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Q. Number of electrons (e-) in phosphorus (P) is 15. valence electrons shall be

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Q. In periodic table, valence electrons are indicated by

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Q. Elements with 4-7 valence electrons are referred to as

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Q. If nucleon (mass) and proton (atomic) number is 40 and 20 respectively, element is

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Q. If number of protons and electrons are 8 respectively, valence electrons are

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Q. Elements in same period may have

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Q. Number of protons in sodium are 11. number of electrons in outermost shell will be

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Q. Elements with 1-3 valence electrons are called

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Q. In periodic table, non-metals are found in the

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Q. Elements with full outermost shells are

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Q. In deuterium, number of neutrons are

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Q. In an atom, number of protons and neutrons are added to obtain

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Q. If proton number is 19, electron configuration will be

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Q. If nucleon number of potassium is 39, number of neutrons will be

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Q. First element in periodic table to have 8 valence electrons is

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Q. All are noble gases except

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Q. Valence electrons refer to the

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Q. Chemical properties of an element are largely derived through

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Q. Elements and their isotopes have

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