Chemistry Questions Identify which atom or ion has a larger atomic or ionic radius, and please explain it.

A) O atom and O(2-) ion
B) Mg atom and Mg(+) ion
C) Na atom and Cl atom.
D) F atom and I atom.

Please help, thanks a lot!

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

What is the oxidation state of each individual carbon atom in c2o42−?