Which one of the following elements is polyatomic? (1) Argon (2) Sodium (3) Sulphur (4) Oxygen

Which one of the following elements is polyatomic? (1) Argon (2) Sodium (3) Sulphur (4) Oxygen
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(3) Sulphur Explanation: The term polyatomic is used for a molecule or an ion which contains either two or more than two atoms.
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According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the

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Which element forms compounds with all others elements except except helium neon and argon?

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There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes

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