The most abundant element on the earth is:

Options

A. iron
B. gold
C. aluminium
D. copper

Explanation

To determine the most abundant element on Earth among the given options (Iron, Gold, Aluminium, and Copper), we can follow these steps:

### Step 1: Identify the Elements
We are given four elements to compare: Iron (Fe), Gold (Au), Aluminium (Al), and Copper (Cu).

### Step 2: Research the Abundance of Each Element
Next, we need to find out the abundance of each of these elements in the Earth's crust:
- **Aluminium (Al)**: Approximately 8.13%
- **Iron (Fe)**: Approximately 5%
- **Copper (Cu)**: Less than 1%
- **Gold (Au)**: Much less than 1%

### Step 3: Compare the Abundances
Now that we have the abundance percentages:
- Aluminium: 8.13%
- Iron: 5%
- Copper: <1%
- Gold: <1%

### Step 4: Determine the Most Abundant Element
From the comparison, it is clear that Aluminium has the highest abundance at 8.13%, making it the most abundant element among the options provided.

### Step 5: Conclusion
Thus, the most abundant element on Earth from the given options is **Aluminium**.

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