Valence electrons
b. have the highest energy level number
c. are gained or lost to form ions
d. all of the above
e. none of the above

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Which substance has non polar covalent bonds

Can anyone answer these questions? ? i need it before 1: 00pm today