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+

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

yep

Answer 5

thank you

Answer 6

no problem

Answer 7

The Periodic Table: The universally accepted cheat sheet.