BIO 251
BIOS 251 Anatomy and Physiology
Exam 2 updated 2025
Which of the following would you classify as a molecule?
Cu
Fe
N
S2F - Correct Ans-S2F
Which of these subatomic particles is found outside of the nucleus of an atom?
Nucleons
Protons
Neutrons
Electrons - Correct Ans-electrons
Which of the following would you classify as a cation?
OH-
K+
S2-
FeO - Correct Ans-K+
If we cut a chunk of iron into smaller pieces, is it still iron no matter how small the pieces
are? - Correct Ans-Yes, an atom of iron would be iron no matter how small the pieces
became.
A molecule with 14 total electrons and 12 total protons has a charge of? - Correct Ans--
2
An atom with 55 protons and 54 electrons has a charge of? - Correct Ans-+1
An atom with 12 protons and 10 electrons has a charge of? - Correct Ans-+2
A molecule with 76 electrons and 73 protons has a charge of? - Correct Ans--3
Which of the following would be a molecule?
Li
CuO
Mg
C - Correct Ans-CuO
An atom has a mass number of 48 and 22 neutrons. How many protons would this atom
have? - Correct Ans-26
1|Page
, BIO 251
Select all the terms we could use to describe an Al atom with a charge of +3. Select all
that apply.
Anion
Ion
Molecule
Cation - Correct Ans-ion, cation
If I had an ion with 26 protons, and 28 neutrons, and 27 electrons, what would be the
charge of this ion? - Correct Ans--1
Which of the following compounds would you expect to be an electrolyte?
N2
O2
KCI
CH4
H2O - Correct Ans-KCl
An ion has 26 protons, 28 neutrons, and 24 electrons. Which element is this ion? -
Correct Ans-iron Fe
Which of the following terms would you use to describe Mg2+. Select all that apply.
Ion
Molecule
Subatomic particle
Element - Correct Ans-ion, element
What subatomic particle is transferred or shared to make chemical bonds? - Correct
Ans-electrons
What is the name of the bonding type that involves the sharing of electrons? - Correct
Ans-covalent bonding
This type of intermolecular bond is key to how water molecules interreact with each
other: - Correct Ans-hydrogen bonding
Hydrogen bonds are a type of: - Correct Ans-intermolecular bond
Which of the following solutions would you consider acidic?
pH 10
pH 4
pH 7
pH 8 - Correct Ans-pH 4
If you were to dissolve 2.5 grams of NaCl in 150 g of water, I would call the NaCl the: -
Correct Ans-solute
2|Page
BIOS 251 Anatomy and Physiology
Exam 2 updated 2025
Which of the following would you classify as a molecule?
Cu
Fe
N
S2F - Correct Ans-S2F
Which of these subatomic particles is found outside of the nucleus of an atom?
Nucleons
Protons
Neutrons
Electrons - Correct Ans-electrons
Which of the following would you classify as a cation?
OH-
K+
S2-
FeO - Correct Ans-K+
If we cut a chunk of iron into smaller pieces, is it still iron no matter how small the pieces
are? - Correct Ans-Yes, an atom of iron would be iron no matter how small the pieces
became.
A molecule with 14 total electrons and 12 total protons has a charge of? - Correct Ans--
2
An atom with 55 protons and 54 electrons has a charge of? - Correct Ans-+1
An atom with 12 protons and 10 electrons has a charge of? - Correct Ans-+2
A molecule with 76 electrons and 73 protons has a charge of? - Correct Ans--3
Which of the following would be a molecule?
Li
CuO
Mg
C - Correct Ans-CuO
An atom has a mass number of 48 and 22 neutrons. How many protons would this atom
have? - Correct Ans-26
1|Page
, BIO 251
Select all the terms we could use to describe an Al atom with a charge of +3. Select all
that apply.
Anion
Ion
Molecule
Cation - Correct Ans-ion, cation
If I had an ion with 26 protons, and 28 neutrons, and 27 electrons, what would be the
charge of this ion? - Correct Ans--1
Which of the following compounds would you expect to be an electrolyte?
N2
O2
KCI
CH4
H2O - Correct Ans-KCl
An ion has 26 protons, 28 neutrons, and 24 electrons. Which element is this ion? -
Correct Ans-iron Fe
Which of the following terms would you use to describe Mg2+. Select all that apply.
Ion
Molecule
Subatomic particle
Element - Correct Ans-ion, element
What subatomic particle is transferred or shared to make chemical bonds? - Correct
Ans-electrons
What is the name of the bonding type that involves the sharing of electrons? - Correct
Ans-covalent bonding
This type of intermolecular bond is key to how water molecules interreact with each
other: - Correct Ans-hydrogen bonding
Hydrogen bonds are a type of: - Correct Ans-intermolecular bond
Which of the following solutions would you consider acidic?
pH 10
pH 4
pH 7
pH 8 - Correct Ans-pH 4
If you were to dissolve 2.5 grams of NaCl in 150 g of water, I would call the NaCl the: -
Correct Ans-solute
2|Page
