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