Calculate the ratio between hybrid orbitals and pure orbitals in Allene.
`CH_2 = C = CH_2`

Explanation

To calculate the ratio between hybrid orbitals and pure orbitals in Allene (CH₂=C=CH₂), we will follow these steps:

### Step 1: Identify the Structure of Allene
Allene has the structure CH₂=C=CH₂, which consists of three carbon atoms and four hydrogen atoms. The central carbon atom is double-bonded to the two terminal carbon atoms.

### Step 2: Determine the Hybridization of Each Carbon Atom
To find the hybridization, we will calculate the steric number for each carbon atom using the formula:
- **Steric Number = Number of Sigma Bonds + Number of Lone Pairs**
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