The structural formula for a water molecule is

Structural formula shows how atoms are arranged and are bonded to each other. The bonds that holds the atoms in water is called covalent bond where electrons are shared by the atoms. A water molecule has a tetrahedral arrangement and has a bent shape with angles of 107.5 degrees.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

since electrons are negative the answer is neagtaive