3. A polar vector is one which? A. Has a starting point of application

B. Tells how much and in which direction an object has changed its position

C. Represents rotational effect

D. Gives the position of an object​

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not