Chemistry Concepts

Front

Stable electron configuration

Back

The outer energy level is full with 8 valence electrons.

Front

Electron dot diagram

Back

Model of an atom in which each dot represents a valence electron.

Front

Element symbol

Back

The symbol in the center represents the nucleus and all the other electrons in the atom.

Front

Ion formation

Back

When an atom gains or loses electrons, it takes on a charge.

Front

Ionic bond

Back

An ionic bond is between a metal (cation) and a nonmetal (anion).

Front

Anion

Back

An ion with a negative charge.

Front

Cation

Back

An ion with a positive charge.

Front

Chemical bond

Back

The force that holds atoms or ions together as a unit.

Front

Ionization energy

Back

The amount of energy used to remove an electron. The lower the ionization, the easier it is to remove an electron from an atom.

Front

Trends for ionization energy

Back

Ionization energies tend to increase from left to right across a period. Ionization energies tend to decrease from the top of a group to the bottom.