Edexcel as level chemistry question paper 2

Edexcel as level chemistry question paper 1
Atomic/Proton Number - ANSWER the number of protons in the nucleus of an atom

Mass Number - ANSWER the total number of protons and neutrons in a nucleus.

Isotope - ANSWER atoms of the same element that have different numbers of
neutrons

Relative Isotopic Mass - ANSWER The mass of an atom of an isotope relative to
one-twelfth of the mass of an atom of the isotope carbon-12

Relative Atomic Mass - ANSWER The average mass of an atom of an element
relative to one-twelfth of the mass of an atom of the isotope carbon-12.

Relative Formula Mass - ANSWER The average mass of a formula unit relative to
one-twelfth of the mass of an atom of carbon-12.

First Ionization Energy - ANSWER The energy required to remove one mole of
electrons from one mole of gaseous atoms to form one mole of positive ions = X(g) -
> X+(g) + e-

Successive Ionisation Energies - ANSWER The energy required to remove an
electron one by one from the same atom

Orbital - ANSWER A region within an atom that that can hold up to two electrons
with opposite spins

Periodicitiy - ANSWER A repeating pattern in a chemical property across different
periods

Ionic Bond - ANSWER The strong electrostatic attraction between oppositely
charged ions

Covalent Bond - ANSWER The strong electrostatic attraction between between two
nuclei and the shared pair of electrons between them

Electronegativity - ANSWER The ability of an atom to attract bonding electrons in a
covalent bond

Metalic Bond - ANSWER The strong electrostatic attraction between metal cations
and the delocalised electrons

Giant Lattice - ANSWER A substance containing a large number of bonded atoms

Simple Molecule - ANSWER A molecule made up of a small number of atoms
bonded covalently