List four of the principal chemical elements found in living organisms and identify an important biological function of each element.
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Q44: When atoms react to form an ionic
Q45: An inorganic compound is one that contains
Q46: A salt is a compound in which
Q47: An atom that has a filled valence
Q48: An example of an anion is K+.
Q50: Oxidation occurs when an atom gains one
Q51: Identify and compare the properties of the
Q52: A chemical formula shows the types and
Q53: What is the approximate pH of ammonia?
A)
Q54: The tetrahedron shape of a methane molecule
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