Which particles have approximately the same size and mass as each other?
protons and neutrons
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Is table salt a compound?
Yes - NaCl
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What is the correct order for obtaining salt from a mixture of sand and salt?
a. dissolving in water - filtration - evaporation
b. evaporation - filtration - dissolving in water
c. filtration - dissolving in water - evaporation
a. dissolving in water - filtration - evaporation
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Black coffee
a. Homogenous
b. Heterogenous
a. Homogenous
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Mixture that is the same throughout
homogeneous
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A single proton has what electrical charge?
positive charge
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True or False
The proportions of the elements in a compound are always fixed.
True
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How many classifications of mixtures are there?
Two
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A mixture is two or more substances. It __________ be separated?
A. Can
B. Can not
A. can
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The smallest particle of an element that still has the properties of that element
atom
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An element is determined by the number of:
protons
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True or False
It is easy to separate the elements of a compound.
False
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Which is the best way to get salt from salty water?
a. evaporation
b. filtration
c. distillation
a. evaporation
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Salad dressing
a. Homogenous
b. Heterogenous
b. Heterogenous
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The negatively charged particles orbiting the nucleus of the atom making up the electron cloud (almost no mass)
electron
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What are The three basic components of an atom?
protons, neutrons, and electrons
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True or false?
The properties of a compound will be the same as the properties of the elements that make up the compound.
False
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Which one of the following is a mixture?
Iron sulfide
Oxygen
Water
Sea water
sea water
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Which of the following is an element?
Sugar
Water
Steam
Snow
Iron
iron
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Where two or more substances are mixed together but not chemically combined, this substance is called
mixture
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The nucleus of an atom consists of:
protons and neutrons
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Hydrogen gas (H2) is a compound?
No - it's a molecule
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Which of the following is not a mixture?
A: cereal and milk
B: koolaid
C: water
D: fruit salad
c. water
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Are there more compounds or more elements?
compounds
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a substance made up of two or more elements chemically combined