Question

chemical formula o3
electrons needed 8/2 for each atom
electrons available add up group #s
electrons shared needed minus available

of bonds shared divided by 2

electron dot diagram

Explanation:

Step1: Calculate electrons needed

Oxygen has 3 atoms. Each oxygen atom needs 8 electrons. So electrons needed = 3×8 = 24.

Step2: Calculate electrons available

Oxygen is in group 6. For 3 oxygen atoms, electrons available = 3×6 = 18.

Step3: Calculate electrons shared

Electrons shared = electrons needed - electrons available = 24 - 18 = 6.

Step4: Calculate number of bonds

Number of bonds = electrons shared÷2 = 6÷2 = 3.

Step5: Electron - dot diagram

The ozone ($O_3$) molecule has a resonance - hybrid structure. One possible electron - dot structure has a double bond and a single bond between the three oxygen atoms, with lone pairs on each oxygen atom to satisfy the octet rule.

Answer:

Electrons Needed: 24
Electrons Available: 18
Electrons Shared: 6

of Bonds: 3

Electron Dot Diagram: One oxygen atom double - bonded to a central oxygen atom and single - bonded to another oxygen atom, with lone pairs on each oxygen to complete the octet (resonance structure exists).