The element not having seven electrons in the outermost orbit is
A. F
B. At
C. Cl
D. Ti

What forms when chemical reactions combine pollution with sunlight?

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.

Joan writes four numbers on the board in standard form, and then she writes their scientific notation