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
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
