Question

Put in order from smallest to largest radii:

1. AI, Na, CI, Ar, Mg
2. S, Te, Po, Se, O
3. Cl, Ca, S, P, Ga, Mg
4. F, CI, Br, I, At

Answer 1

1. Ar, Cl, Al, Mg, Na

2. O, S, Se, Te, Po

Step-by-step explanation:

Just remember the trends. From left to right, atomic radius decreases because proton increases and pulls electrons closer. From top to bottom, atomic radius increases because there are more electron shells.