Science Terms Ch.8

15 terms by barry-44 

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nucleus

the central core of an atom

proton

a particle in the nucleus of an atom that has a positive charge

neutron

a particle in the nucleus of an atom that has no charge

electron

a particle in the nucleus of an atom that has negative charge

element

a substance that is made of only one particular type of atom and cannot be broken down into simpler substances

chemical symbol

one or two letters that represent an elemen's name

periodic table

a chart that arranges all the known elements by their properties

molecule

two or more atoms joined together

compound

a molecule that consists of two or more diffrent elements

chemical formula

a group of chemical symbols and numbers that describes the types and numbers of elements present in a molecule

density

the measure of how compact matter is

chemical reaction

the rearrangement of atoms within molecules with diffrent properties

reactant

a substance present at the start of a chemical reaction

product

a substance produced by a chemical reaction

technology

the application of knowledge to accomplish a goal

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