periodic trends

Atomic size

Distance from atoms center to furthest valence electron

First ionization energy

Energy required to remove one electron from neutral element

Electron affinity

How exothermic the process of adding one electron to neutral atom

Electro negativity

How strongly will the element pull electrons in bond towards itself

Metallic character

Conducting heat and electricity. They tend to form cations. They are ductile shiny solids etc

Non polar covalent bond

0-0.4 bond

Polar covalent bond

0.5-1.9 bond

Ionic bond

2.0+ bond

Ionic bond

Electron transfer from a metal to non metal forming charged ions

Covalent bonding

Opposite charged ions attract

Metal and nonmetal could replace either or both with poly atomic ions

Metallic bonding

Metal atoms in solid metal sample share electrons

Pauli exclusion principle

No two electrons in atom can have the exact same for quantum and two electrons per orbital max

Hunds rule

When filing degenerate (equal in energy) orbitals electrons fill single electrons with parallel spins until forced to double up