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atoms/peroidctable

TermDefinition
atom the smallest particle into which an element can be divided and still be the same element
electrons particles within atoms that are negatively charged
nulceus a small dense center that has a positive charge and is surrounded by moving electrons
protons positively charged particles in the nucleus
neutrons uncharged particles
electron cloud the area where electrons move around the nucleus
atomic number the number of protons in the nucleus of an tom
mass number the total number of protons and neutrons in an atoms nucleus
periodic table arrangement of the elements
average atomic mass weighted average of the masses of all the naturally occurring isotopes of that element
metals elements that are shiny and conduct heat and electricity well
nonmetals poor conductors of heat and electricity dull and brittle
metalloids elements that have some properties of metals and some properties of nonmetals
group each vertical column of elements
period each horizontal row of elements
chemical bond interaction that holds atoms and ions together
valence electrons electrons found in the outermost energy level of an atom
ion a particle with a positive or negative charge
ionic bond a force that brings oppositely charged ions together
covalent bond atoms share one or more pairs of electrons
molecule a group of atoms held together by chemical bonds
metallic bond forms between metal atoms when their outermost energy levels overlap
Created by: 18hickse0606
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