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39 Cards in this Set
- Front
- Back
- 3rd side (hint)
Isotopes |
Atoms of the same element with different neutron numbers |
To do with neutrons |
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Atomic number |
The number of protons in an atom |
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Mass number |
The number of particles, protons and neutrons, in the nucleus |
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Ion |
A positively or negatively charged atom or group of atoms |
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Relative Isotopic Mass |
The mass of an atom of an isotope compared with 1/12 of the mass of an atom of Carbon-12 |
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Relative Atomic Mass |
The weighted mean mass of an atom of an element compared with 1/12 the mass of an atom of Carbon-12 |
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Relative Molecular Mass |
The weighted mean mass of a molecule compared with 1/12 the mass of an atom of Carbon-12 |
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Relative Formula Mass |
The weighted mean mass of a formula unit cleared with 1/12 the mass of an atom of Carbon-12 |
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Amount of Substance |
The quantity whose unit is a mole |
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Avogadro Constant |
The nuber of atoms per mole of the carbon-12 isotope. (6.02 x 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: g mol^-1 |
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Empirical Formula |
The simplest whole number ratio of atoms of each element present in a compound |
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Mole equation |
n = m ÷ M. N is Moles, m is mass, M is molar mass |
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A molecule |
A small group of atoms held together by covalent bonds |
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Molecular formula |
The actual number of atoms of each element in a molecule |
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Molar volume |
The volume per mole of a gas. Units: dm^3 mol^-1. At RTP molar volume is 24.0 dm^3 mol^-1 |
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Work out moles of gas |
n = V(in dm^3) ÷ 24 |
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Concentration of solution |
The amount of solute, in mol, dissolved per 1 dm^3 of solution |
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Concentration equation |
n = c x V (in dm^3) |
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Standard Solution |
A solution of know concentration |
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A Species |
Any type of particle that takes part in a chemical reaction |
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Stoichiometry |
The molar relationship between the relative quantities of substances taking part in a reaction |
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Acid |
A species that is a proton donor |
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Base |
A species that is a proton acceptor |
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An Alkali |
A base that dissolves in water forming aqueous hydroxide ions, OH- |
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Common Acids |
HCL, H2SO4, HNO3 |
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Common Bases |
NaOH, Mg(OH)2, MgO, CuO, NH3, CH3NH2 |
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Common Alkalis |
NaOH, KOH, NH3 |
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A Salt |
Any chemical compound that is formed from an acid when a H+ ion from the acid is replaced by a metal ion or another positive ion such as NH4+ |
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Cation |
Positively charged ion |
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Anion |
A negatively charged ion |
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Hydrated |
A crystalline compound containing water molecules |
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Anhydrous |
A substance that contains no water molecules |
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Water of Crystallisation |
Water molecules that form an essential part of the crystalline structure of a compound |
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Oxidation Number |
A measure of the number of electrons that an atom uses to bond with atoms of another element |
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Oxidation |
Loss of electrons; increase in oxidation number |
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Reduction |
Gain of electrons; decrease in oxidation number |
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Redox Reaction |
Reaction in which both reduction and oxidation take place. OILRIG |
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