$A$ molecule can be defined as the

  • A
    All of these are correct.
  • B
    $A$ group of two or more atoms that are chemically bonded together.
  • C
    $A$ smallest particle of an element or a compound that is capable of an independent existence and shows all the properties of that substance.
  • D
    Substance which is formed by the combination of atoms of the same element or of different elements.

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The chemical symbol for nitrogen gas is

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$(a)$ Triatomic element
$(b)$ Monoatomic molecule
$(c)$ Polyatomic element
$(d)$ Polyatomic ion

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Calculate the number of moles in $60 \text{ g}$ of carbon. (in $\text{ moles}$)

What are ionic and molecular compounds? Give examples.

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