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chapter 3
Term | Definition |
---|---|
matter | everything that has mass tacks up space |
element | the ingredients that makes up all other substances. cant be broken down into other substances. |
metals | good conductors of electricity and heat. can band without breaking. most have a gray color. |
nonmetals | do not conduct heat or electricity very well. may be a gas or a solid. |
semi-metals (metal loid) | sometimes like metals and sometimes like nonmetals |
atom | the smallest part of an element that still acts like an element. |
atomic theory | states that everyting is made of atoms. |
compound | a type of matter made of two or more elements |
molecule | smallest particale of a compound that still acts like that compound. |
proton | positive change. found in the nucleus. |
neutron | no change. found in the nucleus |
electrons | negintive charge. orbits the nucleus |
solid | as a definite shape and volume. partacals are very close together and don't move past each other. keep shape |