Question
Which one of the following represents the correct increasing order of abundance in the Earth’s crust?
The correct answer is
Al – Si – O
Earth's Crust Element Abundance Order
This question requires identifying the correct increasing order of abundance for Oxygen (O), Silicon (Si), and Aluminum (Al) within the Earth's crust.
Elemental Abundance Data
The approximate abundance of these elements by mass in the Earth's crust is as follows:
| Element | Symbol | Abundance (% by mass) |
|---|---|---|
| Oxygen | O | ~46.6% |
| Silicon | Si | ~27.7% |
| Aluminum | Al | ~8.1% |
Determining the Increasing Order
- List the elements and their abundance percentages:
- Aluminum (Al): ~8.1%
- Silicon (Si): ~27.7%
- Oxygen (O): ~46.6%
- Compare the percentages to find the increasing order:
8.1% < 27.7% < 46.6%
- Match the percentages back to the elements:
Al < Si < O
Conclusion
The correct increasing order of abundance for these elements in the Earth's crust is Aluminum, Silicon, and Oxygen.
Final Answer: The final answer is Option C
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