which one is correct:

A)Na+ is smaller than K+
B)K+ is smaller than Na+
C)As3- is smaller than Sb3-
D)Sb3- is smaller than As3-
E)Au+ is smaler than Au3+
F)Au3+ is smaller than Au+

Question

which one is correct:

A)Na+ is smaller than K+
B)K+ is smaller than Na+
C)As3- is smaller than Sb3-
D)Sb3- is smaller than As3-
E)Au+ is smaler than Au3+
F)Au3+ is smaller than Au+

anonymous · Answer

I know that Au3+ is smaller than Au+ but can't figure out the rest

aaronq · Answer

get a periodic table, ones higher up on the table have smaller radii (because they have less protons and, thus, less electrons).

anonymous · Answer

so Na+ is smaller than K+
As3- is smaller than Sb3-

aaronq · Answer

yep

anonymous · Answer

thank you

aaronq · Answer

no problem

doc.brown · Answer

The Periodic Table: The universally accepted cheat sheet.