states that atoms are indivisible and indestructable particles of matter.

atoms of the same element have the same properties and atoms of different elements have different properties

Two or more element combine to form compounds with rearanged atoms in whole number ratios.

Protons-+

Neutrons- no charge

electrons- negative

It is specific for each element

is the same for all atoms of an element

is equal to the number of protons in an atom

represents the nember of particles in the nucleaus.

is equal to the protons plus the neutrons.

can be different for different atoms of the same element.

They form when atoms lose or gain electons.

Have unequal numbers of protons and electrons.

have a net electrical charge.

λ(Wavelength) • ν(Frequency)

Showed that when energy is added to atoms, electrons move from their lowest energy state(ground state) to a higher energy level(excited state).

when electrons fall from the higher state to a lower state of energy they give of packets of light energy called photons

the number associated with shells of electrons and is directly related to the size and energy of the orbital.

represented as n

relates to the shape of the orbital and has ranges from 0 to n-1.

represented as an l

What is the filling order orbital diagram?

                                        1s

                                        2s 2p

                                        3s 3p 3d

                                        4s 4p 4d 4f

                                        5s 5p 5d 5f

                                        6s 6p 6d 6f

                                        7s 7p 7d 7f

Cr=[Ar]4s¹3d⁵

Cu=[Ar]4s¹3d¹⁰

Metals tend to lose electrons to for cations

nonmetals tend to gain electrons to form anions