Chemistry

to learn

21 cards·by deweys5

elements

aufbau principle

electrons in an atom will occupy the lowest energy orbitals

Pauli exclusion principle

no more than 2 electron occupy a single orbital

orbital

region of space where electrons fly

line

emission spectrum

hund's rule

orbitals of the same n and l quantum numbers are each occupied by an electron

ground state

state of lowest possible energy

excited state

if an electron requires additional energy

Electron configuration

exact amount of orbitals occupied in an element

Electro magnetic spectrum

includes x-rays, ultra violet rays, and infared radiation

atomic mass

mass of an atom

atomic theory

all matter is made of indivisble particles called atoms

avogadros constant

number of particles in a mol

law of definite proportion

any sample of a compound always has te same composition

law of multiple proportions

applies to different compounds formed from the same 2 elements

mol

SI unit for amount of a substance

alpha particle

positively charged particles produced by nuclear disintegration

electron

negitive charged particle

isotope

atoms of the same element with different numbers of neutrons

neutron

present in all atomic nuclei: neutral charge

nucleus

center of atom

protron

positvely charged particle