Chemistry UNIT 1

Describe Relative atomic mass.
The mass of an atom relative to 1/12th the mass of a carbon-12 atom.
Describe Relative molecular mass.
The mass of a molecule relative to 1/12th the mass of a carbon-12 atom.
Describe Relative isotopic mass.
The mass of an isotope of an element relative to 1/12th the mass of a carbon-12 atom.
Describe Molar Mass.
The mass of 1 mole of a substance.
What is the first ionization energy?
The energy required to remove 1 mole of electrons from 1 mole of gaseous atoms to from 1 mole of 1+ ions.
What is the second and higher ionization energy?
The energy required to remove 1 mole of electrons from 1 mole of gaseous 1+ ions to form 1 mole of 2+ ions.
What is the first electron affinity?
The energy change when 1 mole of electrons is added to 1 mole of gaseous atoms to form 1 mole of 1- ions
What is the second and higher electron affinity?
The energy change when 1 mole of electrons is added to 1 mole of gaseous 1- ions to form 1 mole of 2- ions
What is the electron configuration from 1s to 5p?
1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p
What was Avogadro’s Cheeky Constant?
The number of atoms, molecules, ions or other chemical entities of a substance in one mole of that substance. L = 6.02 x 1023mol-1.
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