CHEM 103 Module 2: (Latest Update )
General Chemistry I with Lab Questions & Answers
Grade A 100% Correct - Portage Learning
CHEM 103 / CHEM 103 MODULE 2 EXAM GENERAL CHEMISTRY I WITH
LAB | PORTAGE LEARNING LATEST UPDATE 2026/2027 VERIFIED
QUESTIONS & ANSWERS | GRADE A 100% CORRECT
SECTION 1: ATOMIC STRUCTURE & SUBATOMIC PARTICLES
Question 1
The nucleus of an atom contains which of the following?
A) Protons and electrons
B) Electrons and neutrons
C) Protons and neutrons
D) Protons, neutrons, and electrons
Correct Answer: C
1
,Rationale: The nucleus contains protons and neutrons. Electrons are found in the
electron
cloud surrounding the nucleus [citation:1].
Question 2
The atomic number of an element is equal to the number of:
A) Neutrons
B) Protons
C) Electrons in a neutral atom
D) Both B and C
Correct Answer: D
Rationale: The atomic number (Z) is the number of protons in the nucleus. In a
neutral atom,
the number of protons equals the number of electrons. The atomic number
determines the
element's identity [citation:1].
Question 3
Which subatomic particle has a relative mass of approximately 1 amu and a charge
of +1?
A) Electron
2
,B) Proton
C) Neutron
D) Positron
Correct Answer: B
Rationale: A proton has a relative mass of approximately 1 atomic mass unit (amu)
and a
charge of +1. A neutron has a mass of approximately 1 amu and no charge. An
electron has
a negligible mass (~1/1836 amu) and a charge of -1 [citation:1].
Question 4
Which subatomic particle has a negligible mass and a charge of -1?
A) Proton
B) Neutron
C) Electron
D) Alpha particle
Correct Answer: C
Rationale: The electron has a very small mass (approximately 1/1836 of a proton)
and a
3
, charge of -1. Electrons are found in the electron cloud surrounding the nucleus
[citation:1].
Question 5
A neutral atom of carbon-12 contains:
A) 6 protons, 6 neutrons, and 6 electrons
B) 6 protons, 6 neutrons, and 12 electrons
C) 12 protons, 6 neutrons, and 6 electrons
D) 6 protons, 12 neutrons, and 6 electrons
Correct Answer: A
Rationale: Carbon-12 has an atomic number of 6 (6 protons) and a mass number of
12
(6 protons + 6 neutrons). In a neutral atom, the number of electrons equals the
number of
protons (6) [citation:1].
Question 6
How many neutrons are in an atom of chlorine-37? (Chlorine has an atomic
number of 17.)
A) 17
B) 18
4
General Chemistry I with Lab Questions & Answers
Grade A 100% Correct - Portage Learning
CHEM 103 / CHEM 103 MODULE 2 EXAM GENERAL CHEMISTRY I WITH
LAB | PORTAGE LEARNING LATEST UPDATE 2026/2027 VERIFIED
QUESTIONS & ANSWERS | GRADE A 100% CORRECT
SECTION 1: ATOMIC STRUCTURE & SUBATOMIC PARTICLES
Question 1
The nucleus of an atom contains which of the following?
A) Protons and electrons
B) Electrons and neutrons
C) Protons and neutrons
D) Protons, neutrons, and electrons
Correct Answer: C
1
,Rationale: The nucleus contains protons and neutrons. Electrons are found in the
electron
cloud surrounding the nucleus [citation:1].
Question 2
The atomic number of an element is equal to the number of:
A) Neutrons
B) Protons
C) Electrons in a neutral atom
D) Both B and C
Correct Answer: D
Rationale: The atomic number (Z) is the number of protons in the nucleus. In a
neutral atom,
the number of protons equals the number of electrons. The atomic number
determines the
element's identity [citation:1].
Question 3
Which subatomic particle has a relative mass of approximately 1 amu and a charge
of +1?
A) Electron
2
,B) Proton
C) Neutron
D) Positron
Correct Answer: B
Rationale: A proton has a relative mass of approximately 1 atomic mass unit (amu)
and a
charge of +1. A neutron has a mass of approximately 1 amu and no charge. An
electron has
a negligible mass (~1/1836 amu) and a charge of -1 [citation:1].
Question 4
Which subatomic particle has a negligible mass and a charge of -1?
A) Proton
B) Neutron
C) Electron
D) Alpha particle
Correct Answer: C
Rationale: The electron has a very small mass (approximately 1/1836 of a proton)
and a
3
, charge of -1. Electrons are found in the electron cloud surrounding the nucleus
[citation:1].
Question 5
A neutral atom of carbon-12 contains:
A) 6 protons, 6 neutrons, and 6 electrons
B) 6 protons, 6 neutrons, and 12 electrons
C) 12 protons, 6 neutrons, and 6 electrons
D) 6 protons, 12 neutrons, and 6 electrons
Correct Answer: A
Rationale: Carbon-12 has an atomic number of 6 (6 protons) and a mass number of
12
(6 protons + 6 neutrons). In a neutral atom, the number of electrons equals the
number of
protons (6) [citation:1].
Question 6
How many neutrons are in an atom of chlorine-37? (Chlorine has an atomic
number of 17.)
A) 17
B) 18
4
