Question

question #4
a teacher drew three figures on the board.
which option correctly classifies each figure as a compound, element, or mixture?
a figure 1: element; figure 2: compound; figure 3: mixture
b figure 1: element; figure 2: mixture; figure 3: compound
c figure 1: compound; figure 2: element; figure 3: mixture
d figure 1: compound; figure 2: mixture; figure 3: element

Explanation:

• Element: Consists of only one type of atom. In Figure 1, all the particles are the same (single - atom particles), so it is an element.
• Compound: Consists of two or more different atoms chemically combined. In Figure 2, all the particles are the same and each particle is made up of two different types of atoms (chemically bonded), so it is a compound.
• Mixture: Consists of two or more different substances (elements and/or compounds) not chemically combined. In Figure 3, there are two types of particles (one - atom particles and two - atom particles which are compounds), so it is a mixture.

Answer:

A. Figure 1: element; Figure 2: compound; Figure 3: mixture