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biology_2.1

TermDefinition
atom basic unit of matter
nucleus strong forces bind protons and neutrons together
electron negatively charged particle (−) with 1/1840 the mass of a proton
element pure substance that consists entirely of one type of atom
isotope atoms of the same element that differ in the number of neutrons they contain
compound a substance formed by the chemical combination of two or more elements in definite proportions
chemical bond atoms in compounds are held together
ionic bond formed when one or more electrons are transferred from one atom to another
ion positively and negatively charged atoms
covalent bond forms when electrons are shared between atoms
molecule the smallest unit of most compounds
van der Waals force intermolecular forces of attraction
Created by: 13_rbianchi
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