Studied by 0 peoplechemical change
alters chemical identity of substance
physical change
change that does not impact the chemical identity of a substance
Atoms
the building blocks of all matter on Earth
Chemical Element
A substance made of atoms of the same kind
Chemical Compound
Atoms of two or more elements in whole number ratios
Relative Atomic Mass
Electron
negatively charged particles that are very light
Proton
Positively charged
shares charge with neutron
Ions
atoms that have lost or gained one or more electrons and thus have a net charge
Cations
have lost electrons
positive charge
Anions
have gained electrons
have a negative charge
Isotopes
atoms with the same number of protons but different numbers of neutrons in their nucleus
Mass Number (A)
Total Number of protons and neutrons in the nucleus
Atomic Number (Z)
the number of protons in the nucleus
Molecules
atoms combined in small numbers
Relative Average Mass
Relative Average Mass = (Mass of isotope 1 x % abundance of isotope 1 + Mass of isotope 2 x % abundance of isotope 2 + ...) / 100
Note
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