Chemistry Shell Michaelmas revision

No description.

atom

smallest part of an element

nucleus

the central part of an atom

proton

positively charged particle found in the nucleus

neutron

neutral particle found in the nucleus

electron

negatively charged particle found in shells around the nucleus

group

vertical column or the periodic table

period

Horizontal row of the periodic table

mass number

sum of the number of protons and neutrons

isotopes

Atoms of the same element with the same number of protons but different number or neutrons

relative atomic mass

average mass of an atom of an element compared to the 1/12th of the mass of an atom of carbon-12.

electron configuration

how the electrons are arranged in an atom

noble gases

gaseous elements occupying group 0 they are nonreactive

alkali metals

Metal elements occupying group 1 of the periodic table

halogens

Non-metal elements occupying group 7 of the periodic table

inert

Chemically nonreactive

ion

an atom or group of atoms that carries a charge

ionic bond

the electrostatic attractions between oppositely charged ions.

electrostatic attraction

the attraction between particles with opposite charges

giant structure

Large, repeating structure that extends in 3 dimensions

lattice

A regular and repeating structure of particles