General Science - Chemistry

Atom

Building blocks of our world

Atomic Radius

The size of an atom.

Anion

Negatively charged atom

Cation

Positively charged atom

Chemical Bonding

The process when ions gain/lose electrons to create a full outer shell.

Combustion

When oxygen reacts with a hydrocarbon to produce water and carbon dioxide.

Covalent Bonding

Atoms share electrons (Non-metals).

Decomposition

When a composition breaks down into two or more simpler elements.

Electron Shielding

When inner electrons shield the outer electrons from the full force of the nucleus.

Electrostatic Attraction

When two oppositely charged ions are attracted to each other.

Ion

Elemental atom with a positive or negative charge

Ionic Bonding

Atoms transfer electrons

Ionic Compounds

When a cation and anion are bonded together (Shares valence electron/s).

Ionisation Energy

Decreases when going down a group from top to bottom.

Metallic Bonding

Atoms share electrons in an area of free-moving electrons (Metals).

Rate of Reaction

Increases the effectiveness of collisions. The speed at which a reaction happens.

Synthesis Reaction

When two simple elements form one more complicated one.