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- 1. Multiple Choice
1. ___________ are the smallest unit of an element that maintains the properties of that element.
Atoms
Elements
Compounds
mixtures
- 2. Multiple Choice
2. A/An _______________ is made up of one or more of the same kind of atom chemically combined.
atom
element
compound
molecule
- 3. Multiple Choice
3. A/an _____________ contains a variety of elements and compounds that are not chemically combined with each other.
atom
element
compound
mixture
- 4. Multiple Choice
4. A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.
mixture
pure substance
compound
element
- 5. Multiple Choice
5. True or False: elements and compounds are pure substances.
True
False
- 6. Multiple Choice
6. Elements are broadly classified as metals, nonmetals, and _________________.
compounds
mixtures
metalloids
- 7. Multiple Choice
7. Coffee, mouthwash, and vinegar are examples of __________________ mixtures.
heterogeneous
homogeneous
pure substances
- 8. Multiple Choice
8. Baking soda is the common name for sodium bicarbonate, or NaHCO3. It can be produced through chemical reactions involving carbon dioxide and sodium hydroxide. It is a
pure substance
mixture
- 9. Multiple Choice
9. Blood is a fluid found in the bodies of humans and other animals. It can be physically separated into plasma, red blood cells and white blood cells. Blood is a ___________________
pure substance
mixture
- 10. Multiple Choice
10. Ammonia is a colourless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a ___________________ .
compound
element
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