Unit 1: Matter, Chemical Trends, and Chemical Bonds

Atomic Radius

The size of an atom, measured from the nucleus to the outermost electron shell

Electronegativity

An atom’s ability to attract electrons in a chemical bond

Ionization Energy

Energy required to remove an electron from an atom

Electron Affinity

Energy change when an atom gains an electron

Intramolercular Forces

Forces that hold atoms together within a molecule

Intermolecular Forces

Forces between molecules

Lewis Diagram

Diagram showing valence electrons around atoms

Polarity

Unequal sharing of electrons within a bond or molecule

Dipole

Seperation of positive and negative charges in a bond

Ion

Charged particle formed when an atom gains/loses electrons

Cation

positively charged ion

Anion

Negativily charged ion

Isotope

Atoms of the same element that have different number of neutrons

Average Atomic Mass

Weighted average mass of an elements naturally occuring isotopes