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chapter 3
Term | Definition |
---|---|
matter | everything that has mass and takes up space |
element | ingredients makes up all other substances. can not be broken down into other substances. |
metals | good conductors of electricity and heat. can bend without breaking. most have a gray color |
nonmetals | do not conduct heat or electricity very well. may be a gas or solid |
semimetals | sometimes like metals sometimes like nonmetals. |
atom | the smallest part of an element that still acts like that element. |
atomic theory | states that everything is made of atoms |
compound | a type of matter made of two or more elements. |
molecule | smallest particle of a compound that still acts like that element |
proton | positive charge. found in middle |
nuetron | no charge. found in the nucleolus |
electron | negative charge. orbits the nucleolus |