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L1 Atomic Structure

Definitions for part A of acids and bases AS90944

TermDefinition
Monoatomic ions Ions with only one atom.
Atom The smallest particle of an element.
Atomic number The number of protons in the nucleus of an atom.
Mass number The number of protons plus the number of neutrons in the nucleus of an atom.
Charge The amount of electricity on a particle – positive or negative.
Proton Positively charged subatomic particle found in the nucleus of an atom.
Neutron Neutral subatomic particle found in the nucleus of an atom.
Electron Negatively charged subatomic particles found moving rapidly around the nucleus.
Electron Arrangement (configuration) The position of the electrons in the energy level around the nucleus
Element A substance which is composed of only one type of atom.
Compound A substance which is composed of two or more different types of atoms chemically bonded.
Isotopes Atoms with the same number of protons but different numbers of Neutrons.
Reaction rates The speed at which a chemical reaction occurs.
Particles Atoms, molecules or ions.
Ion Atoms or groups of atoms which have lost or gained electrons to become a charged particle.
Ionic bonding Strong electrostatic attraction between positive and negative ions to form a large 3D network.
Ionic compound Substance composed of oppositely charged ions (metal with non-metal)
Formula Symbol representation of the atoms present in a substance.
Symbol Equation Symbol representation of the reactants and products of a chemical reaction.
Word Equation Word representation of a chemical equation.
Metal oxide Ionic substance consisting of a metal and oxygen. (eg MgO)
Metal hydroxide Ionic substance consisting of a metal and hydroxide ions. (eg NaOH)
Metal carbonate Ionic substance consisting of a metal and carbonate ions (eg CaCO3 )
Metal bicarbonate Ionic substance consisting of a metal and a hydrogen carbonate ion. ( eg NaHCO3 ).
Created by: kjsime