Properties of Water

Compound

Compound

Pure substance with unique properties; formed when two or more different elements combine.

Covalent Bond

A type of chemical bond formed when atoms share electrons.

Molecule

A compound whose atoms are held together by covalent bonds.

Polar Molecule

Molecule with oppositely charged regions.

Hydrogen Bond

Weak electrostatic bond formed by the attraction of opposite charges between a hydrogen atom and an oxygen, fluorine, or nitrogen atom.

Cohesion

Attraction of molecules for other molecules of the same kind.

Adhesion

Hydrogen bonds formed with molecules on other surfaces.

Solution

A homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).

Suspension

Heterogeneous mixture of two or more substances.

Acid

Substance that makes hydrogen ions (H⁺) when dissolved in water; an acid solution has a pH less than 7.

Base

Substance that releases hydroxide ions (OH⁻) when dissolved in water; a basic solution has a pH greater than 7.

Water Molecule

Hydrogen atoms linked to an Oxygen atom that acts like a magnet because it has both POSITIVE and NEGATIVE charges

Insects walking on water

Example of surface tension