Watercolor painting demonstrations, advice, and gallery. Painting the sky and clouds with watercolor. Painting the sky and clouds. After doing the drawing our first watercolor painting step is painting the sky and clouds. Create a very weak mixture of French Ultramarine and Burnt Sienna, about the strength of a weak cup of tea.
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment. Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms. A polar molecule with two or more polar bonds must have an asymmetric geometry so that the bond dipoles do not cancel each other.
in chemical bonding: The polarity of molecules. A polyatomic molecule will have polar bonds if its atoms are not identical. However, whether or not the molecule as a whole is polar ( i.e., has a nonzero electric dipole moment) depends on the shape of the molecule.