IB Chemistry Sub-topic S3.1 Definitions

Non-metals that gain valence electrons to gain a negative charge

Distance from nucleus to valence electron

Positive ions. Commonly metals that lose valence electrons to gain a positive charge.

Energy change during electron addition to an isolated mole of gaseous atoms

Relative measure of the attraction an atom has for a shared pair of electrons when covalently bonded to another atom

The attraction of opposite charges between the positive nucleus and negative electrons

The energy required to remove one electron from amole of atoms in a gaseous atoms, expressed in kJ/mol

one column of the periodic table 

Distance from nucleus to valence electron of cation or anion

The amount of positive charage in the nucleus, proportional to the number of protons

one row of the periodic table 

The periodic table is table of all known elements organized in order of increasing atomic number 

The repeating pattern of physical and chemical properties shown by different periods

The effect of inner electrons taking nuclear charge away from the valence electrons