Explain the following variations in atomic or ionic radii: Ca2 >Mg2 >Be2 For cations with the same charge, ionic radii going down a column, because there is a (n) in the principle quantum number and the average distance from the nucleus of the outer electrons.

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound

What are the coefficients to balance the following equation? ba+br2=babr2