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Ionization energy is the _____ energy required to _______  one mole of electron from one mole of gaseous atom at ground state.

1. The ______the atomic radius, the ________the attraction, the _______the ionisation energy.

Across a period, Ionization energy ____a____

Down a group, ionisation energy ____b_____

Which element has the greatest ionization energy: Aluminum (Al)    or    Chlorine (Cl)?

Which group on the periodic table is composed of inert (not reactive)  gases?

Francium (Fr) has the lowest ionization energy in Group 1 because - 

When moving left to right across a period, the atomic size decreases.  This means the first IE ___________.

When going down a group, the atomic size increases. This means the first IE __________.

Which of the following factors will affect ionization energy: