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Basically because your skin has several layers to it (see link, below), and the layer that has the blood vessels capable of bleeding in it is further down than a superficial scrape would affect.
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Answer:
New solids and gases are formed,including sugar and oxygen
Answer:
Here's what I get
Explanation:
If the orbital is 5d, n = 5 and l=2.
mₗ = -l, -l + 1, -l + 2, …., l
(mₛ is a quantum number for electrons)
Thus, we can have the following combinations.

That makes a total of five 5d orbitals.
The pictures below show what two of them look like.
Answer:
Two classes of pure substances are elements and compounds