Question

u2. water

1. sketch a ball and stick diagram of a water molecule. label the atoms and indicate the partial charges that exist in a water

Explanation:

A water molecule consists of two hydrogen atoms and one oxygen atom. Due to the difference in electronegativity between oxygen and hydrogen, the oxygen - end has a partial negative charge ($\delta -$) and the hydrogen - ends have partial positive charges ($\delta +$). In a ball - and - stick diagram, the oxygen atom is usually represented as a larger ball and hydrogen atoms as smaller balls, connected by sticks representing the covalent bonds.

Answer:

Draw a larger ball to represent the oxygen atom and two smaller balls to represent the hydrogen atoms. Connect the oxygen atom to each hydrogen atom with a stick to represent the covalent bonds. Label the larger ball as "O" (oxygen) and the smaller balls as "H" (hydrogen). Indicate a partial negative charge ($\delta -$) on the oxygen atom and partial positive charges ($\delta +$) on each hydrogen atom.