chem mod 1 terms

atomic radius: the radius of the circle formed by the outermost electron shell

down a period because there are more electron shells

across a group because there are more protons so there is stronger attraction between the nucleus and electrons

an element’s ability to attract electrons

down a period because attraction between outer electrons and protons weaken due to larger distances between them

across a period because protons increase but electron shells stay the same, so there is a stronger attraction between protons and electrons

forces between molecules

a hydrogen bonded to an F, O or N, and is near F, O, or N that has a lone pair of electrons

the difference in electronegativity between two atoms or compounds

its electron distribution is symmetrical

its electron distribution is not symmeterical

the ability to carry an electric charge

it has delocalised electrons which can carry an electric charge

how well the solute dissolves in the solvent

the strength of intermolecular forces between solute and solute compared to the strength of intermolecular forces between solute and solvent

the strength of intermolecular forces between SOLUTE and SOLUTE compared to the strength of intermolecular forces between SOLUTE and SOLVENT