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9 Cards in this Set
- Front
- Back
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Matter-is anything that has mass and takes up space. |
Atom- a defined small particle that makes up most types of matter. |
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Laws of conservation of matter-states that the matter is not created or destroyed. |
Electrons- invisible,negatively charged particles are called electrons. |
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Nucleus-central part of the atom |
Protons-positively charged particles in the nucleus |
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Neutrons-uncharged particles |
element-a matter made of only one kind of atom |
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Atomic number-tells you the number of protons in the nucleus of each atom of the element |
isotopes-atoms of the same element that have different numbers of neutrons |
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Mass number- is the number of protons plus the number of nuetrons it contains. |
atomic mass-is 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. |
Nonmetals- are elements that are usually dull in appearance. |
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Metalloids-are elements that have characterisitcs of metals and nonmetals. |
Substance-same composition and properties |
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Compound- a substance whose smallest unit is made of atoms of more than one element bounded together. |
Mixture-when two or more substances come together but dont combine to make a new substance,a mixture results. |
