Chemistry Finals Review 2024 (Atomic Structure & Electron Configurations)

Mr. Janick 1st hr

Protons

Found in Nucleus, 1+ charge per proton, 1 AMU atomic mass unit.  Number of protons = the atomic number

Neutrons

Found in Nucleus, 0 charge, 1 AMU (atomic mass unit)

The mass of an atom (mass number [?+?])

Protons + Neutrons

Electrons

Found in Electron Cloud (Orbit, Shell), 1- charge per electron, 0 AMU atomic mass unit.  Number of electrons = the number of protons in a neutral atom.  Electrons determine the chemical bonding between atoms

Nucleus

Center of the atom and has the protons and neutrons

Atomic Number

Number of protons

Ions

Gained or lost electrons

Cation

Lose electrons. Has a positive charge

Anion

Gains electrons.  Has negative charge

Isotope

Atoms of the same element (type) that has different number of neutrons (Changes the Mass)

Calculate protons, neutrons and mass (Example problems)

Bohr Energy Levels (#)

7

How many Electrons per energy level?

2, 8, 18, 32, (32, 32, 32)

S, P, D, F electrons

S = 2

P = 6

D = 10

F = 14