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24 Cards in this Set
- Front
- Back
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Matter |
anything that has mass and takes up space. |
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atom |
a small particles that make up most types of matter |
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Law of conservation of matter |
states that matter can't be created nor destroyed |
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electons |
invisible, negatively charge particles |
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nucleus |
the positively charged, central part of the atom |
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protons |
positively charges particles in the nucleus |
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neutrons |
no charge |
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elements |
matter made of only one kind of atoms |
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atomic number |
number of protons in the nucleus of each atom of a given element |
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isotope |
atoms of the same element that have different number of neutrons. |
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mass number |
is the number of protons plus the number of neutrons it contains. |
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atomic mass |
is the weighted average mass of the isotopes of an element |
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metal |
generally have a shiny or metallic luster. |
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nonmetal |
are elements that are usually dull in appearance |
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metalliod |
are elements that have characteristics |
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substance |
matter that has the same composition and properties throughout. |
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compound |
a substance whose smaller unit is made up of atoms of more than one element bonded together. |
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mixture |
when two or more substances come together but don't combine to make a new substance |
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What did the Rutherford's gold experiment show? |
Some of the positively charged alpha particles would bounce back. |
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How do you find the number of neutrons in an atom? |
you subtract the number of protons from the mass number. |
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What charge does each particle of am atom have? |
Protons have a positive charge and Neutrons has no net charge. |
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What are the different classifications of elements? |
Metal, Metalloids, Nonmetals. |
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What is the difference between a mixture and a compound? |
a mixture you can separate the different things and compounds you can't separate. |
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What information does a chemical formula give you? |
gives you all the individual that make the compound. |
