Atoms and reactions

  • Created by: Kat098
  • Created on: 03-04-18 18:31
Isotope
Atom of the same proton number but different neutron number
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Atomic number
Number of protons in the nucleus of an atom
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Mass Number
Number of protons and neutrons in a nucleus
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Ion
A positively/negatively charged atom
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Relative isotopic mass
Mass of an atom of an isotope compared to 1/12th of the mass of an atom of carbon-12
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Relative atomic mass
Weighted mean mass of an atom of an element compared to 1/12th of the mass of an atom of carbon-12
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Relative molecular mass
Weighted mean mass of a molecule compared to 1/12th of the mass of an atom of carbon-12
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Relative formula mass
weighted mean mass of a formula unit comapred to 1/12th of the mass of an atom of carbon-12
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Avogadro Constant
Number of atoms per mole of the carbon-12 isotpe (6.02x10^23mol^-1)
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Mole
Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12
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Molar mass
Mass per mole of a substance
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Molar gas volume
Volume per mole of a gas
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Concentration
Amount of solute, in mol, dissolved per 1dm^3 of solution
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Standard solution
A solution with a known concentration
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Concentrated
A large amount of solute per dm^3
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Species
Type of particle that takes part in chemical reactions
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Stoichiometry
Molar relationship between relative quantities of substances taking part in a reaction
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Percentage yiled
actual amount, in mol, of product / theoretical amount
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Atom economy
mass of desired product / mass of all products
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Acid
Species that is a proton donator and release H+ ions
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Base
Species that is a proton acceptor (OH-)
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Alkali
Type of base dissolved in water forming OH- ions
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Salt
Ant chemical compound formed when the H+ in an acid is replaced by a metal ion
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Cation
Postiviely charged ion
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Amphoteric substances
Substances that can react as both acids and bases
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Water of crystallisation
water moleucles that form an essential part of the crystalline structure of a compound
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Anhydrous
A substance that contains no water molecules
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Oxidation number
Number of electrons 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 that has both oxidation and reduction taking place
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Reducing agent
Reagent that reduces (adds electrons to) another species
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Oxidising agent
Reagent that oxidises (takes electrons from) another species
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Atomic structure
Positively charged nucleus supprounded by negatively charged electrons, revolving in orbits art varying distances from the nucleus
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Other cards in this set

Card 2

Front

Number of protons in the nucleus of an atom

Back

Atomic number

Card 3

Front

Number of protons and neutrons in a nucleus

Back

Preview of the back of card 3

Card 4

Front

A positively/negatively charged atom

Back

Preview of the back of card 4

Card 5

Front

Mass of an atom of an isotope compared to 1/12th of the mass of an atom of carbon-12

Back

Preview of the back of card 5
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