Which one of the following best defines the word 'allotropes'?

Different structural forms of an element

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A pair of substances that differ by

H^{+}

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Elements that possess properties intermediate between those of metals and non-metals

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Atoms of a given atomic number that have a specific number of neutrons

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Solution

The correct option is B Different structural forms of an element
Allotropes are defined as various forms in which an element exists and differ in their physical and some of their chemical properties.

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Similar questions

Put tick () against correct choice and cross () against wrong choice in the following question:

Isotopes of an element have

(a) the same physical properties

(b) different chemical properties

(d) different atomic numbers

Consider the following statements:

1. The number of protons in the nucleus of an atom of a given element is called the atomic number of that element.

2. Mass number of an atom is defined as the sum of number of protons and neutrons present in the nucleus of an atom.

3. Atoms of an element that have the same atomic number (Z) but different mass number (A) are called isotopes.

Which of the above statements is incorrectly stated?

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