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Atoms and Molecules MS-PS1-1

NGSS

atom

the smallest particle of an element
atom Simple Definition

covalent bond

a chemical bond formed when atoms share electrons
covalent bond Simple Definition

electron

a negatively charged particle outside the nucleus of an atom
electron Simple Definition

ionic bond

the attraction between oppositely charged ions
ionic bond Simple Definition

molecule

a group of atoms held together by bonds
molecule Simple Definition

neutron

an uncharged particle in the nucleus of an atom
neutron Simple Definition

proton

a particle with a positive charge in an atom’s nucleus
proton Simple Definition

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