Magnesium
Sodium
Calcium
Silicon
Answer is Wrong!
Answer is Right!
The correct answer is: D. Silicon
Silicon is the most common element in the Earth’s crust, and it is also the most common element used in solar cells. Solar cells are made of semiconductor materials, which are materials that can conduct electricity under certain conditions. Silicon is a semiconductor material, and it is able to convert sunlight into electricity.
Magnesium, sodium, and calcium are all elements that are also used in solar cells, but they are not as common
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