ABUNDANCIA DE EL ALUMINIO EN VENEZUELA

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Why is nh3 classified as a polar molecule

Can someone me with 3 and 4 plz. this is for masteries test.