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What is matter?
Matter is anything that has mass and occupies space.
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What is the definition of an atom?
The smallest form of matter still having the properties of an element.
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The atomic number tells us what?
The number of protons in the nucleus.
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The total lack of matter is called what?
vacuum
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The periodic table is organized in what two ways?
By atomic mass and by period. Period is the properties of elements - metals, non-metals, and gases.
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What are three different forms of matter?
solid, liquid, and gas
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A proton has what kind of charge?
positive
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If an atom loses an electron, we call it a what?
Ion
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What is the measure of the amount of matter in an object?
Mass
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The letters C, O, H, Kr are called what?
symbols
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All matter is made of particles called what?
atoms
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A neutron has what kind of charge?
neutral
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When two or more atoms combine to form a compound, we call it a what?
A compound
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How do we find volume?
displacement
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Dimitri Mendeleev developed what?
The periodic table
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Atoms are made of what?
Protons, Neutrons, and electrons
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An electron has what kind of charge?
Negative
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Electrons are found where?
Outside the nucleus, in the electron cloud.
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What can you use to find mass?
A scale or a triple beam balance.
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What are three forms of matter shown on the periodic table?
Metals, non-metals, gases which all come in solids, liquids, and gases.
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Inside of a neutron or protron you have what two smaller particles?
Quarks and gluons
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What two elements combine in the nucleus of an atom?
Protons and neutrons
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What are the four properties of matter?
mass, volume, density, vacuum
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How do you find density?
divide the mass by the volume
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How do we find the number of neutrons in an atom?
We subtract the atomic number from the atomic mass.
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