Which of the following trends in the periodic table should be expected as the atomic number of the halogens increases from fluorine (F) to iodine (I)?

Question

Quizplus · Accepted Answer

As you move down the group in the periodic table from fluorine to iodine, the atomic radius increases due to the addition of more electron shells. This increase in distance between the valence electrons and the nucleus, along with the increased effect of electron shielding, generally causes a decrease in electronegativity. Atomic mass and electron number increase, not decrease, as you move down the group.

Which of the Following Trends in the Periodic Table Should