Question

answer the questions with element (e), compound (c), or mixture (m).

1. ______ this is made up one type of atom.
2. ______ you can see the different parts.
3. ______ water (h2o) is an example.
4. ______ two or more elements combined chemically.
5. ______ oxygen is an example.
6. ______ salt water is an example.
7. ______ can be found on the periodic table.
8. ______ can be separated physically.
9. ______ cannot be separated.
10. ______ can be separated.

Explanation:

To solve these questions, we use the definitions of Element (E), Compound (C), and Mixture (M):

• Element (E): A pure substance made of only one type of atom. Found on the periodic table. Cannot be separated into simpler substances by chemical or physical means (except nuclear reactions).
• Compound (C): A pure substance made of two or more elements chemically combined. Can be separated into elements by chemical reactions (not physical means).
• Mixture (M): A combination of two or more substances (elements or compounds) physically mixed. Parts can be seen (if heterogeneous) or not (if homogeneous), and can be separated by physical means.

1. This is made up of one type of atom.

By definition, an element consists of one type of atom.

Answer:

E

2. You can see the different parts.

Mixtures (especially heterogeneous ones) have visibly distinct parts (e.g., salad, sand and water).