Chemistry Unit 1 Definitions

HideShow resource information
  • Created by: shayoni
  • Created on: 09-12-12 22:08

Unit 1 Chemistry 

Definitions

  • ISOTOPES: Atoms of the same proton number with different number of neutrons
  • ATOMIC NUMBER: Number of protons in nucleus of an atom
  • MASS NUMBER: Number of protons and neutrons in nucleus
  • ION: A positively or negatively charged atom
  • RELATIVE ISOTOPIC MASS: Mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12
  • RELATIVE ATOMIC MASS: Weighted mean mass of an element compared with 1/12 of the mass of an atom of carbon-12
  • RELATIVE MOLECULAR MASS: Weighted mean mass of a molecule compared with 1/12 of the mass of an atom of carbon-12
  • RELATIVE FORMULA MASS: Weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of carbon-12
  • AVOGADRO CONSTANT, NA: Number of atoms per mole of the carbon-1 isotope (6.02 x 10²³ mol⁻¹)
  • MOLE: Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12 isotope
  • MOLAR MASS: Mass per mole of a substance (g mol⁻¹)
  • CONCENTRATION: Amount of solute, in mol, dissolved per 1 dm³ of solution
  • SPECIES: Type of particle that takes part in chemical reaction
  • STOICHIOMETRY: Molar relationship between relative quantities of substances taking part in a reaction
  • ACID: Species that is a proton donor
  • BASE: Species that is a proton acceptor
  • ALKALI: Type of base dissolved in water forming OH⁻ ions
  • SALT: Any chemical compound formed from an acid, whose protons have been replaced by metal or ammonium ions
  • HYDRATED: Crystalline compound containing water molecules
  • ANHYDROUS: Substance that doesn’t contain water molecules
  • WATER OF CRYSTALLISATION: Water molecules that form an essential part of crystalline structure of a compound
  • OXIDATION NUMBER: Measure of number if electrons that an atom uses to bond with atoms of another element- derived from set of rules
  • OXIDATION: Loss

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »