A pure substance is any substance on its own. For example, sand is impure for containing lots of different substances. However, diamonds are mostly pure for only containing one type of substance.
Whether a substance is pure or not doesn't relate to a substance's molecular structure, but different molecules in a substance. Water by itself is only H2O, therefore it still pure.
Water is not an element but a compound for containing different elements, however it still pure.
Viruses are considered non living because they lack the ability to reproduce without a host cell.
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If a child has a cat and calls all small furry animals a cat, it is an example of assimilation. This can also be known as over-generalization. When the child sees that furry animals it fits their schema of a cat.
The answer your looking for is 20 Amino Acids.<span>
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Cation. Sodium has 10 electrons with 1 outer valence electron, and outer valence electrons are positive. This means that it will have a charge of +1, and a cation is a positively charged ion that is attracted to the cathode during electrolysis, which is the decomposition (chemically) of something that happens after an electric current passes through it.
