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18 Cards in this Set
- Front
- Back
Matter |
Anything that has mass and takes up space. |
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Atom |
Defined as a small particle that makes up most types of matter. |
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Law Conservation of Matter |
Matter is not created nor destroyed, it only changes form. |
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Electron |
Invisible, negatively charged particles. |
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Nucleus |
Positively charged, central part of the atom. |
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Protons |
Positively charged particles in the nucleus. |
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Neutrons |
Particles from the nucleus that have no-charge. |
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Element |
Matter made up of only one kind of atom. |
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Atomic Number |
The top number on the periodic table elements, tells how many protons are in the nucleus. |
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Isotopes |
Atoms of the same element that have different numbers of neutrons. |
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Mass Number |
The number of protons plus the number of neutrons it contains. |
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Atomic Mass |
The weighted average mass of the isotopes of an element. |
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Metals |
Generally have a shiny or metallic luster and are good conductors of heat and electricity. |
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Non-Metals |
Elements that are usually dull in appearance. |
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Metalloids |
Elements that have characteristics of metals and non-metals. |
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Substance |
Matter that has the same composition and properties throughout. |
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Compound |
A substance whose smallest unit is made up of atoms of more than one element bonded together. |
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Mixture |
When two or more substances, elements, or compounds come together but don't combine to make a new substance it is called a _______. |