AP Chemistry· difficulty 2/5
Atomic radius generally _______ across a period (left to right) and _______ down a group.
increases; increases
decreases; decreases
decreases; increases
increases; decreases
Explanation
Across a period: more protons pull electrons in (radius shrinks). Down a group: more shells (radius grows).
Want 10 more like this — adaptive to your weak spots?
Group 2 elements (alkaline earth metals) typically form ions with charge…
chevron_rightFor Mg, the ionization energies are: IE₁ = 738, IE₂ = 1450, IE₃ = 7733 (kJ/mol). The huge jump from IE₂ to IE₃ shows…
chevron_rightZeff (effective nuclear charge) felt by an outer electron is…
chevron_right