10. A compound is a material composed of two or more components. Water, carbon dioxide and table salt are some examples of compounds.
11. In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction.
Answers & Comments
Answer:
10. C
11. A
Explanation:
10. A compound is a material composed of two or more components. Water, carbon dioxide and table salt are some examples of compounds.
11. In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction.