Wahl421 Wahl421

04-01-2017
Chemistry

contestada

Which is a pair of allotropes?

A. carbon-14 and carbon-12
B. diamond and carbon dioxide
C. iron(III) oxide and iron(II) oxide
D. molecular oxygen and ozone

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heavenboy1 heavenboy1

04-01-2017

A. Carbon-14 & Carbon-12

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djsdoodle djsdoodle

04-01-2017

The answer is D. moleculer oxygen and ozone.
Allotropes are different physical forms of an element. For example, diamond and graphite are allotropes of carbon. (C12 and C14 are isotopes of carbon as they have different numbers of neutrons.)

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