Chapter 2 - Matter and Density

Vocabulary flashcards derived from Chapter 2 physics and chemistry lecture notes covering matter, density, mass, volume, and related principles.

Matter

Anything that occupies space and has mass.

Law of Definite Proportions

States that a chemical compound always contains the same elements in exactly the same proportion by mass, regardless of the size or source of the sample.

Particle Model of Matter

States that all physical matter exists in the form of particles in constant motion; also known as the kinetic model of matter.

Atom

The building block of all matter; the smallest particle of an element.

Molecule

A distinct group of two or more atoms.

Volume

The amount of space an object takes up.

Mass

The amount of matter in an object.

Density

The mass of matter contained within a particular volume ($D = \frac{m}{V}$); water has a density of $1.0\,g/cm^3$.

SI Unit for Weight

Newton

Mass Formula

$$\text{Mass} = D \times V$$

Volume Formula

$$\text{Volume} = \frac{M}{D}$$

Density Triangle

A visual representation used to derive formulas relating mass ($m$), density ($D$), and volume ($V$).