A substance composed of two or more different elements in fixed proportions is known as a(n) _____.
A) atom
B) element
C) molecule
D) ion
E) compound

Question

Quizplus · Accepted Answer

A compound is a substance composed of two or more different elements in fixed proportions. Option A (atom) refers to a single unit of an element, option B (element) refers to a pure substance made up of only one type of atom, option C (molecule) refers to a group of two or more atoms held together by covalent bonds, and option D (ion) refers to an atom or molecule that has gained or lost one or more electrons, resulting in a positive or negative charge.

A Substance Composed of Two or More Different Elements in Fixed