Biology 1406 Chapter 2 questions n answers rated A+

Biology 1406 Chapter 2 questions n answers rated A+What is an element? - correct answer a substance that can not be broken down to other substances by chemical reactions What elements comprise 96% of living organisms - correct answer carbon, hydrogen, oxygen, nitrogen What is a trace element - correct answer elements that are required in minute quantities What is the smallest unit of matter that retains the properties of an element? - correct answer atom protons - correct answer found in nucleus positively charged large in mass and size neutrons - correct answer reside in nucleus neutral/no charge large in mass and size electrons - correct answer reside in orbital negatively charged small in mass and size dalton - correct answer measure of mass for atoms and subatomic particles on the periodic table what do atoms in the same rows have in common? - correct answer contain same number of electron shells elements are ordered by increasing atomic number