3. Distinguish between a complex substance and an elemental substance.
A1, A2a
4. (a) What are the two general classes of ele
ments? (b) Do all elements fit definitely int
one of these classes? A1, A2e
5. Distinguish between a compound and
mixture. A1, A2, A5a
6. What are the five most abundant element
by mass in the earth's surface environment
A3d
7.) (a) What are the properties of metals? (b)
nonmetals? A2e​

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next