Question

question 1 (3 points)
title: ch - 01 - 09
which of the following contains a single type of atom?
a heterogeneous mixture
b elements
c compounds
d homogeneous mixture

Explanation:

Elements are substances made up of only one type of atom. Heterogeneous and homogeneous mixtures contain multiple substances, and compounds are made of different types of atoms chemically bonded.

Answer:

B. elements