# 27.7: G

Difficulty Level: At Grade Created by: CK-12
gamma ray (γ)
Very high energy electromagnetic waves emitted from a nucleus.
gas
Form of matter that has neither a definite shape nor a definite volume.
gas pressure
The pressure that results from collisions of gas particles with an object.
Gay-Lussac’s law
Gas law which states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas when the volume is kept constant.
Geiger counter
A device that uses a gas-filled metal tube to detect radiation.
gene
A segment of DNA that carries a code for making a specific polypeptide chain.
geometric isomer
Molecules in which the order of atom bonding is the same but the arrangement of atoms in space is different.
Graham’s law
Law that states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of the molar mass of the gas.
ground state
Lowest energy state of the atom.
group
Vertical column of the periodic table.

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