Arrange the elements Al, Na, and P in order of increasing atomic radii based upon their position on the periodic table.

Question

Quizplus · Accepted Answer

Atomic radius increases from top to bottom within a group and decreases from left to right across a period in the periodic table. Since P and Al are in the same period with P to the left of Al, P < Al. Na is below Al in the same group, so it has a larger atomic radius than Al, making the order P < Al < Na.

Arrange the Elements Al, Na, and P in Order of Increasing