Question

Matching

Enter the letter of the box whose contents best match the description.

8

8

8

a

b

с

e

f

v a mixture of molecules

atoms of a pure elementa metal

molecules of an element

va solid compound

a mixture of elements

a. box a

b. box e

c. box b

d. box f

e. box d

f. box c

QUESTION 10

Answer 1

Chemical substances can be classified as atomic elements, molecular compounds, ionic compounds, or molecular elements, based on their atomic make-up. Mixtures can be identified as either homogeneous or heterogeneous, based on whether their composition is uniform or not.

Step-by-step explanation:

Understanding Chemical Substances and Mixtures

To classify substances, it's important to understand the different categories they can fall into. An atomic element is a substance that contains only one type of atom, such as iron (Fe). A molecular compound, like PCl3, consists of molecules made up of atoms from different elements. An ionic compound, such as LiBr, is composed of positively and negatively charged ions, typically metal and nonmetal ions. A molecular element is a molecule consisting of atoms from the same element, like O2 for oxygen gas or P4.

Substances can also be classified based on their homogeneity. A homogeneous mixture has a uniform composition throughout, and all samples of the mixture will be identical in composition and properties, like white wine. On the other hand, a heterogeneous mixture has a non-uniform composition, like ranch-style salad dressing, which can have different compositions in different parts of the mixture.

Using these classifications, we can determine the categories of different substances provided in a matching exercise. For instance, mercury (b) would match with atoms of a pure element because it consists of only mercury atoms, while table sugar (d) is a solid compound made up of carbon, hydrogen, and oxygen atoms in a specific ratio.

Answer 2

a mixture of molecules - Box f

atoms of a pure elementa metal - Box D

a solid compound - Box C

a mixture of elements - Box A

Step-by-step explanation:

Box a has mixture of elements which forms a solid like shape but there are different elements present in the box. The box f has mixture of molecules in which many atoms are combined together. Box c has solid compound with single element.