Why Does Water Form Drops?

Water forms drops whenever water molecules are attracted to each other by a force that is stronger than the attraction between water molecules and other molecules.

Water Beads into Drops in Air

2 water molecules conned by a "Hydrogen Bond"
Source-sweetwordsfromasourpatch.wordpress.com

Water molecules are made up of 2 hydrogen atoms and 1 atom of oxygen. These atoms are  arranged in a particular configuration that is unique to water molecules.

This arrangement of atoms produces a net charge (positive and negative) in different parts of the water molecule. This attribute of a water molecule is known as "polarity".

The existence of the negative and positive charges creates attraction (known as "hydrogen bonds") between water molecules.

In environments, like air, this bond is much stronger between water molecules than between a water molecule and any other negatively or positively charged molecule in air.

Water molecules forming 3-D structure of a drop
Source - ifm.liu.se

The result is the clustering of  a large number of water molecules together in a wide variety of configurations to form a 3-D structure, that we see and call a "water drop"

The shape is influenced by surface tension. More in my next post.