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Reil [10]
3 years ago
13

An element has an atomic mass number of 16 and an atomic number of 7. How many protons and neutrons?

Biology
1 answer:
Otrada [13]3 years ago
8 0
Protons- 7
Neutrons- 9
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4. If index of refraction 1 is 1.5, index of refraction 2 is 2.0, and the angle of incidence is 45 degrees, what is the angle of
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Answer: The angle of refraction is 32°

Explanation:

By snell law, we have that:

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