C190 Indtoduction to Biology (WGU)
Module 3 Exam Questions and Answers
Graded A+
Hydrogen bonds attract _______ or parts of molecules to each other. - Correct
answer-molecules
A ______________ bond forms between the oxygen of one molecule and the
hydrogen of another molecule. - Correct answer-hydrogen
As a result of keeping more electrons, the oxygen will develop a partial charge.
What will that charge be? - Correct answer-positive
In this bond, oxygen & hydrogen do not equally share the electrons. Which atom
will keep the electrons for a longer period? - Correct answer-oxygen
The most important strongly electronegative elements in biological systems are: -
Correct answer-oxygen & nitrogen
Atoms like oxygen have a _____________ electronegativity. - Correct answer-high
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, electronegativity - Correct answer-The tendency of an atom to hold shared
electrons more close to its nucleus.
An oxygen atom has room for two electrons in its outer shell. By sharing electrons
with two hydrogen atoms, a water molecule (H20) is formed. What kind of bond
forms this molecule? - Correct answer-covalent
Electrons are shared in a _______ bond. - Correct answer-covalent
Which word best describes what electrons do in a covalent bond? - Correct answer-
share
Covalent - Correct answer-This bond represents the sharing of the electrons
(negatively charged subatomic particles between atoms).
Which information would help you determine that atoms were bonded together
through an ionic bond? - Correct answer-The number of ellectrons gained or lost
by each atom.
Ionic bonds form between atoms of the __________ charge. - Correct answer-
opposite
If two atoms both lose one electron each, will they form an ionic bond with each
other? - Correct answer-No, because they will have the same charge.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Module 3 Exam Questions and Answers
Graded A+
Hydrogen bonds attract _______ or parts of molecules to each other. - Correct
answer-molecules
A ______________ bond forms between the oxygen of one molecule and the
hydrogen of another molecule. - Correct answer-hydrogen
As a result of keeping more electrons, the oxygen will develop a partial charge.
What will that charge be? - Correct answer-positive
In this bond, oxygen & hydrogen do not equally share the electrons. Which atom
will keep the electrons for a longer period? - Correct answer-oxygen
The most important strongly electronegative elements in biological systems are: -
Correct answer-oxygen & nitrogen
Atoms like oxygen have a _____________ electronegativity. - Correct answer-high
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, electronegativity - Correct answer-The tendency of an atom to hold shared
electrons more close to its nucleus.
An oxygen atom has room for two electrons in its outer shell. By sharing electrons
with two hydrogen atoms, a water molecule (H20) is formed. What kind of bond
forms this molecule? - Correct answer-covalent
Electrons are shared in a _______ bond. - Correct answer-covalent
Which word best describes what electrons do in a covalent bond? - Correct answer-
share
Covalent - Correct answer-This bond represents the sharing of the electrons
(negatively charged subatomic particles between atoms).
Which information would help you determine that atoms were bonded together
through an ionic bond? - Correct answer-The number of ellectrons gained or lost
by each atom.
Ionic bonds form between atoms of the __________ charge. - Correct answer-
opposite
If two atoms both lose one electron each, will they form an ionic bond with each
other? - Correct answer-No, because they will have the same charge.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
