Atoms, Isotopes, + Ions

atom

the smallest unit of matter that retains the properties of a chemical element

isotope

variant of an element that CHANGES the number of NEUTRONS, same number of protons

Ion

if an atom loses or gains electrons, it will become charged and known as an ion

Mass Number

the mass of an individual atom equal to the sum of proton + neutron

Atomic number

identifies an element on periodic table,

equal to the number of protons in nucleus of an atom

on periodic table

atomic mass

on periodic table

weighted average of all naturally occurring isotopes that exist for an element

electron

subatomic particle with a negative charge, on the outside

proton

positively charged subatomic particle in the nucleus

neutron

particle with same mass of a proton, no charge