All matter that exists naturally on Earth.

Based on the premise that the atoms of different elements could be distinguished by differences in their weights.

States that the volume of a fixed amount of gas held at a constant temperature varies inversely with the pressure.

A form of matter that has its own definite shape and volume.

The smallest particle of an element that retains the properties of the element.

States that the volume of a given amount of gas is directly proportional to its Kelvin temperature at constant pressure.

A form of matter that flows, has constant volume and takes the shape of its container.

A green flash of light produced by some form of radiation.

States that the pressure of a fixed amount of gas varies directly with the Kelvin temperature when the volume remains constant.

A form of matter that not only flows to conform to the shape of its container, but also fills the entire volume of its container.

By carefully measuring the effects of both magnetic and electric fields on a cathode ray.

States the relationships between pressure, temperature, and volume of a fixed amount of gas.

A characteristic of matter that can be observed or measured without changing the samples condition.

A tiny, dense region in the center of an atom.

It describes the physical behavior of an ideal gas in terms of the pressure, volume, temperature, and number of moles of gas present.