Chapter 02: Test Bank
1. Which of the following is not one of the most common elements in living things?
2. Which one of the following is the smallest unit of matter that has all the properties of an element?
3. Elements differ from each other in their
A. physical properties only.
B. atomic number only.
C. type of subatomic particles.
D. physical properties and atomic number.
E. type of electrons.
4. Regarding atoms, identify which statement below is correct.
A. An element may be composed of several types of atoms.
B. The nucleus of an atom contains protons and electrons.
C. The number and arrangement of electrons in an atom governs its chemical activity.
D. The positive charges of an element are carried by the electrons.
E. The neutral charges of an element are carried by the protons.
5. Isotopes of an element differ in their
A. proton number.
B. electron number.
C. neutron number.
D. type of bonds.
E. atomic number.
6. An atom’s valence electron shell
A. is filled when it has three electrons.
B. determines its chemical reactivity.
C. determines its atomic mass.
D. is filled with positively charged particles.
E. is filled identically for every element.
7. An atom that has an electrical charge is called a(n)
8. A covalent bond occurs when
A. protons are transferred from one atom to another.
ESSENTIALS OF BIOLOGY 5TH EDITION MADER TEST BANK
Copyright © 2018 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
B. neutrons are shared between two atoms to form an isotope.
C. electrons are shared between two atoms to complete their octets.
D. the hydrogen of one water molecule is attracted to the oxygen of another water molecule.
E. electrons are transferred from one atom to another.
9. The type of bond that would form from the transfer of an electron from one atom to another, shown below, is a(n)
10. Which of these does not occur when a sodium atom transfers an electron to a chlorine atom?
A. The sodium atom becomes a positively charged ion.
B. The positive and negative ions will attract each other, forming a crystal if no water is present.
C. The ions will separate in the presence of water.
D. There is a mutual sharing of the electrons between the sodium and chlorine atoms.
E. The chlorine atom becomes a negatively charged ion.
11. Which of the following is not a compound?
B. O- 2-
12. Glucose, C6H12O6, is best described as a(n)