Question

chemical formula co2
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 :o=c=o:

Explanation:

Step1: Determine electrons needed

Carbon (C) needs 8 electrons and each Oxygen (O) needs 8 electrons. Total electrons needed for $CO_2$: $8 + 2\times8=24$.

Step2: Calculate electrons available

Carbon is in group 4, has 4 valence - electrons. Oxygen is in group 6, each has 6 valence - electrons. Total electrons available: $4+2\times6 = 16$.

Step3: Find electrons shared

Electrons shared = Electrons needed - Electrons available. So, $24 - 16=8$.

Step4: Calculate number of bonds

Number of bonds = Electrons shared / 2. So, $\frac{8}{2}=4$.

Answer:

Electrons Needed: 24
Electrons Available: 16
Electrons Shared: 8

of Bonds: 4

Electron Dot Diagram: $\ddot{O}=C=\ddot{O}$