The chemical bond between which two atoms is most polar? a) c–n b) h–h c) s–cl d) si–o

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 element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

What was bohr’s contribution to the planetary model