Water Molecule Dot Structure Concepts

The video tutorial explains how to draw the dot structure for water (H2O). It begins by calculating the total number of valence electrons using the periodic table, considering hydrogen and oxygen's group numbers. The tutorial then guides through placing the least electronegative atom at the center, bonding the atoms with covalent bonds, and ensuring the octet rule is satisfied. Finally, it checks the electron count to confirm the structure is correct.

What is the first step in drawing the dot structure for water?

• Draw the molecular shape

• Calculate the molecular weight

• Determine the number of valence electrons

• Identify the central atom

How many valence electrons does each hydrogen atom contribute in water?

• Four

• Two

• One

• Three

What is the total number of valence electrons in a water molecule?

• 6

• 10

• 8

• 12

Which atom is placed at the center of the water molecule?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon

How many electrons are used to form bonds in the water molecule?

• 4

• 6

• 8

• 2

What is the next step after assigning electrons to bonds in the water molecule?

• Calculate the molecular weight

• Recalculate the valence electrons

• Determine the molecular shape

• Complete the octets on the outside atoms

How many electrons does oxygen need to complete its octet?

• 2

• 4

• 8

• 6

What should be checked after completing the dot structure of water?

• The number of protons

• The molecular weight

• The atomic number

• The satisfaction of outer shells