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Duplicate of Chemistry Review Part 1 - Pure Substances, Mixtures, Elements, Compounds Flashcards | StudBud
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Duplicate of Chemistry Review Part 1 - Pure Substances, Mixtures, Elements, Compounds
Duplicate of Chemistry Review Part 1 - Pure Substances, Mixtures, Elements, Compounds
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Part 1 of the 8th grade chemistry review. Purse substances, Mixtures, Elements, Compounds
Flashcards
8 cards
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Questions
8
Answers
1
Which of the following contains only one type of atom?
compound
element
mixture
solution
2
In an atom, what forms a cloud around the nucleus?
protons
positively charged particles
electrons
neutrons
3
What do water (H
2
O), carbon dioxide (CO
2
), and salt (NaCl) have in common?
Water, carbon dioxide, and salt are elements.
Water, carbon dioxide, and salt are atoms.
Water, carbon dioxide, and salt are compounds.
Water, carbon dioxide, and salt are mixtures.
4
An atom has no charge; what is true about the number of protons and electrons it has?
The number of protons does not equal the number of electrons
There are more electrons than protons in the atom.
The number of protons equals the number of electrons
There are more protons than electrons in the atom.
5
Which of the following is an example of the formation of a mixture?
sodium and chlorine forming table salt
rust forming on an iron nail
hydrogen and oxygen reacting to produce water
sugar crystals dissolving in water
6
What is the smallest unit of a compound that still has the properties of that compound?
a proton
a pure substance
a molecule
an atom
7
A ____ is a group of substances in which each individual substance retains its own properties.
compound
pure substance
element
mixture
8
Atoms of the same element that have different numbers of neutrons are:
isotopes
compounds
molecules
ions
