Question

Classify each item by matching as a compound (C) or element (E). Cu HCl CCl₄ Co HI CH₄

Answer 1

A pure substance which can be separated into simpler substances by any chemical or physical means is known as compound. Compounds have two or more type of atoms.

A pure substance which cannot be divided into simpler substances by any chemical or physical means is known as elements. Elements have only one type of atom.

Hence,

$Cu$ is element (E)

$HCl$ is compound (C)

$CCl_4$ is compound (C)

$Co$ is element (E)

$HI$ is compound (C)

$CH_4$ is compound (C)

Answer 2

Cu (E)
HCl (C)
CCl4 (C)
Co (E)
HI (C)
CH4 (C)