In general, stainless steel crowns are used for children's teeth because they don't require multiple dental visits to put in place and so are more cost- effective than custom-made crowns and prophylactic dental care needed to protect a tooth without a crown.
Phosphorus comes from many places. You might think that the biggest sources of phosphorus are the obvious onesâsewage treatment plants, chemical factories, and the like. But in fact, identifiable sources such as these contribute less than 20% of the phosphorus in the river.
Quick Answer. Phosphorus contains 15 protons. Protons, along with neutrons, are particles that make up the nucleus of an atom. Atoms also contain electrons, which neutralize the positive charge of protons. Continue Reading.