BSC 2010-Steven Marks Exam 1
Questions & Answers with Rationales
| Complete Exam Study Guide | 2026
Updated
, 1. Which of the following lists some of the levels of biological organization from less
complex to more complex?
atoms, molecules, cells, organs
2. The innermost electron shell of an atom can hold up to _____ electrons.
2
3. What relationship is true of an uncharged atom?
The number of protons is equal to the number of electrons.
4. What determines the types of chemical reactions that an atom participates in?
the number of electrons in the outermost shell
5. What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?
6
6. What refers to atoms with the same atomic number but different atomic masses?
isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine
have?
10
7. An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How
many protons does boron have?
5
8. What is the mass number of an ion with 109 electrons, 159 neutrons, and a +1 charge?
269
9. Which of the following subatomic particles always has a positive charge?
proton
10. Changing the number of __________ would change an atom into an atom of a different
element.
protons in an atom
, 11. Compared with 31P, the radioactive isotope 32P has
one more neutron
12. We can represent atoms by listing the number of protons, neutrons, and electrons−−for
example, 2p+,2n0,2e− for helium. Which of the following represents the 18O isotope of
oxygen?
8p+,10n0, 8e-
13. An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of
________.
6
14. which of the following atoms has the smallest number of neutrons?
a. nitrogen-14
b. oxygen-16
c. carbon-14
d.neon-20
a. nitrogen-14
15. The atomic number of Nitrogen is 7. Which of the following explains the greater mass
number of nitrogen-15 compared to nitrogen-14? Nitrogen-15 contains ________.
8 neutrons and nitrogen-14 contain 7 neutrons
16. To find out the number of neutrons in an atom, we need to know...
mass and atomic number
17. Based on electron configuration, which of the elements would exhibit a chemical
behavior similar to oxygen?
a. nitrogen
b. phosphorus
c. carbon
d. sulfur
18. d. sulfur
19. which subatomic particle(s) have a mass of ~1amu?
proton and neutron
20. which subatomic particle(s) have a mass of ~1/2000amu?
electron
Questions & Answers with Rationales
| Complete Exam Study Guide | 2026
Updated
, 1. Which of the following lists some of the levels of biological organization from less
complex to more complex?
atoms, molecules, cells, organs
2. The innermost electron shell of an atom can hold up to _____ electrons.
2
3. What relationship is true of an uncharged atom?
The number of protons is equal to the number of electrons.
4. What determines the types of chemical reactions that an atom participates in?
the number of electrons in the outermost shell
5. What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?
6
6. What refers to atoms with the same atomic number but different atomic masses?
isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine
have?
10
7. An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How
many protons does boron have?
5
8. What is the mass number of an ion with 109 electrons, 159 neutrons, and a +1 charge?
269
9. Which of the following subatomic particles always has a positive charge?
proton
10. Changing the number of __________ would change an atom into an atom of a different
element.
protons in an atom
, 11. Compared with 31P, the radioactive isotope 32P has
one more neutron
12. We can represent atoms by listing the number of protons, neutrons, and electrons−−for
example, 2p+,2n0,2e− for helium. Which of the following represents the 18O isotope of
oxygen?
8p+,10n0, 8e-
13. An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of
________.
6
14. which of the following atoms has the smallest number of neutrons?
a. nitrogen-14
b. oxygen-16
c. carbon-14
d.neon-20
a. nitrogen-14
15. The atomic number of Nitrogen is 7. Which of the following explains the greater mass
number of nitrogen-15 compared to nitrogen-14? Nitrogen-15 contains ________.
8 neutrons and nitrogen-14 contain 7 neutrons
16. To find out the number of neutrons in an atom, we need to know...
mass and atomic number
17. Based on electron configuration, which of the elements would exhibit a chemical
behavior similar to oxygen?
a. nitrogen
b. phosphorus
c. carbon
d. sulfur
18. d. sulfur
19. which subatomic particle(s) have a mass of ~1amu?
proton and neutron
20. which subatomic particle(s) have a mass of ~1/2000amu?
electron
