How is the term atomic number defined for a given atom?
A) as the mass of one mole of that element or isotope
B) as the sum of the number of protons, neutrons, and electrons
C) as the sum of the number of protons and neutrons in the nucleus
D) as the number of protons in the nucleus
Question 2
Which of the following describes reverse osmosis?
A) High pressure saltwater is forced against a semipermeable membrane and fresh water comes out.
B) Saltwater is chemically reacted with aluminum particles, which chemically binds to the chloride ions.
C) The water is heated until it evaporates and condenses in a pure form.
D) High pressure saltwater is reacted with aluminum, which absorbs the sodium ions in an oxidation reaction.
E) none of the above
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