Qualitative

Consisting of general observations about the system.

Qualitative Analysis

The determination of the types of ions present in a solution.

Quantitative

Comprising numbers obtained by various measurements of the system.

Quantitative Analysis

The determination of the amount of substances present in a sample.

Quantum

The smallest quantity of energy that can be emitted (or absorbed) in the form of electromagnetic radiation.

Quantum Numbers

Numbers required to describe the distribution of electrons in hydrogen and other atoms.