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Definitions
terms i need to know
| Term | Definition |
|---|---|
| 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
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