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25 Cards in this Set
- Front
- Back
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Homogenous |
The same throughout |
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Heterogenous |
See different parts |
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Metalloids |
Elements that have characteristics of metals and nonmetals |
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Atom |
A small particle that makes up most types of matter |
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Electrons |
Invisible,negatively charged particles |
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Laws of Matter |
States that matter is not created or destroyed |
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Nucleus |
The positively charged central part of an atom |
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Proton |
The positively charged particles in the nucleus |
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Neutron |
Uncharged particles |
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Models of atoms |
Often used for things that are too small or big to be observed |
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Periodic Table |
Things that have been discovered among elements |
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Element |
Matter made from only on kind of matter |
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Dewey Decimal Classification |
Characterize and organize their volumes and to help you find books quickly and electricity |
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Atomic Number |
The top number in elements |
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Isotopes |
Atoms of the same element that has no different numbers and neutrons |
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Mass Numbers |
The number of protons plus the number of neutrons it contains |
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Atomic Mass |
The weighed average mass of the isotopes of an element |
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Metals |
Generally have a shiny or a metallic luster and are good conductors, but dull in appearance |
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Compounds |
A substance waste smallest unit is made up of atoms of more than on element bounded together |
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Nonmetals |
Elements that are usually dull in appearance |
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Substances |
Has the same composition and properties throughout |
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Mixtures |
Come together but don't combine to make a new substance |
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Classification of Elements |
Elements fall into three general categories, metals, metalloids, and nonmetals. The elements in each category have similar properties |
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Physicists |
A scientist who studies physics study of matter and interactions of matter study of energy and its ability to change matter |
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Chemist |
A scientist who studies chemistry and chemical research and experiments |
