Which of the following correctly explains how the atomic radius of atoms trend on the periodic table?
Choose ALL correct answers.
A The atomic radius of elements in the 5th period will be larger than elements in the 2nd period.
B The atomic radius increases from left to right across periods, because the affinity of the nucleus and
valence electrons of atoms also increase from left to right.
C The atomic radius of fluorine (F) is smaller than beryllium (Be). Fluorine's 9 protons and 9 electrons
will have a greater attraction than beryllium's 4 protons and 4 electrons.
D The atomic radius decreases from the bottom of a group to the top, because the number of energy
levels decrease.