The atomic number of an atom refers to its ____
a. mass or weight
b. number of protons
c. number of protons and neutrons
d. number of neutrons
e. number of electrons
ANSWER: b
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All atoms possess the ability to do work. The term that is defined as the ability to do work is:
A. matter B. energy C. molecules D. space
A chemical that denatures proteins is MOST likely to be classified as a(n) ________ agent
A) antiseptic B) bacteriostatic C) bacteriocidal D) detergent
What term describes the time it requires for exactly one-half of a given amount of a radioactive isotope of an element to decay?
A. decay time. B. decay product. C. half-life. D. half-decay. E. useful dating range.
Isotopes of atoms
a. are electrically unbalanced. b. behave the same chemically and physically but differ biologically from other isotopes. c. are the same physically and biologically but differ from other isotopes chemically. d. have the same number of protons but a different number of neutrons. e. are produced when atoms lose electrons