chemistry - periodic trends

ionization energy

the energy required to remove an electron from an atom

increases

Ionization energy _______ when you go left to right across the period

decreases

Ionization energy _________ when you go down the group/family

electron affinity

the attraction of an atom for an additional electron

1st ionization energy

the energy required to remove the most loosely bound electron from a neutral atom

shielding effect

Along with the increased distance of the outer electrons from the nucleus, the shielding effect of the inner electrons causes ionization energy to decrease going down a column on the periodic table

metal

a low ionization energy is a characteristic of a _______

non-metal

an element with a high ionization energy is classified as a ______

electronegativity

the attraction an atom has for shared electrons is called _______

atomic radius

the distance from the nucleus to the outer most electron is known as the ______

noble gases

The ________ do not have measured electronegativities since they do not commonly form compounds

zeff

pull between nucleus and electrons

shielding

attraction between nucleus and electrons

increases

electronegativity ______ when you go left to right across the period

decreases

electronegativity ________ when you go down the group

decrease

atomic radius _______ when you go left to right across the period

increases

atomic radius ______ when you go down the the group

alkali metals

elements located in group 1

alkaline earth metals

elements located in group 2

halogens

elements located in group 17

noble gases

elements located in group 18