Chem Ch. 3

12 cards·by moemoe

Atomic Number

identifies the number of protons and electrons of an individual atom

Mass Number

the sume of the protons and nuetrons in the nucles of an atom

Nucleus

postiveley charged center of the atom, gives atom its mass, made up of proton and neutrons

Average Atomic Mass

average mass of all known isotopes of an element

Isotopes

same type of atom with diffrent number of nuetrons in the nucleus

Electrons

negitivley charges particles of the atom

Avogadros Number

6.02 x 10(23)

Protons

postivley charged particles of the atom, gives the atom its identity

Neutrons

the neutral particle of the nucleus

Atom

smallest particle of an element that retains the properties of the element

Mole (mol)

used to measure a quanity

Quarks

smallest subatomic particle currently discovered