Question

Answer the following questions:
1. Describe one difference between silicon dioxide and one of it's elements.
2. What percentage of the earth's crust is made up of silicon and oxygen?

Answer 1

Answer:

1.The difference between Silicon Dioxide and silicon. Silicon Dioxide: it is an oxide. Silicon: silicon simple substance is more lively and a non-metallic elements, stable elements and can form compounds with 96 kinds of 64 kinds of elements. The main purpose is determined by its silicon semiconductive.

2.Lutgens and Edward J. Tarbuck, Earth's crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent.

Answer 2

Answer:

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(^^)(^^)