Measure of distance from one point to another

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

What are fructose and glucose an example of?

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.