Chimica Unidad Uno

neutron charge


Proton charge

positive (+1)

electron charge

negative (1)

Atomic number

the number of protons in the nucleus of an atom

Mass of an atom

protons + neutrons

atomic number

protons and electrons

No two different elements will have the ________ atomic number?


atomic weight

Average of the mass numbers of all isotopes


Atoms of the same element that have different numbers of neutrons

Mass number

the sum of the number of neutrons and protons in an atomic nucleus


mass # - protons

average atomic mass formula

(Percent to decimal)(mass) + (percent to decimal)(mass)