Hello,

1.--Scalar quantity?refers to the quantity, which has only magnitude and no direction.

--On the other hand,?vector quantity?implies the physical quantity which comprises of both magnitude and direction.2.--scaler is One-dimensional quantity .

-- vector is multi dimensional quantity.

3.-- scaler -It changes with the change in their magnitude.

--vector-it changes with the change in their direction or magnitude or both.

4.--scaler follows ordinary algebra rules.

--vector follows rules of vector algebra.

5.Last but not the least,

--scalar quantity can divide another scalar

--but this cannot be done in the case of a vector quantity.

Hope it helps