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Definitions

terms i need to know

TermDefinition
Isotopes Atoms of a same element with a different number of neutrons.
Atomic(proton)number the number protons in the nucleus of an atom
mass(nucleon)number the number of particals (protons and neutrons)in the nucleus
a Ion A positively or negatively charged atom or (covalently bonded)group of atoms(molecular ion)
relative isotopic mass the mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12
relative atomic mass the mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12
Relative molecular mass (Mr) The weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of carbon -12
Relative formula mass The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
Amount of substance the quantity whose unit is the mole.( used by chemist as a way of counting atoms
Avogadro constant the number of atoms per mole of the carbon-12 isotope(6.02*10^23 mol-1)
a Mole the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope
molar Mass (M) the mass per mole of a substance (units are gmol-1)
Emperical formula the simplest whole number ratio of atoms of each element present in a compound
molecule a small group of atoms held together by a covalent bonds
molecular formula the actual number of atoms in each element in a moleclue
molar volume the volume per mole of gas
concentration the concentration of a solution is the amount of solute in mol dissolved per 1 dm3 of solution
standard solution a solution of known consentration
speices any type of particle that takes part in a chemical reaction
acid a specis that is a proton donor
base a species that is a proton acceptor
alkali a type of base that dissolves in water forming hydroxide ions
salt any chemical compound formed from an acid when an h+ ion from the acid is removed and replaced by a metal ion
Created by: poppybadger