BIOLOGY 1201 EXAM 1 (LSU DR.
BHATTACHARYA) QUESTIONS &
ACTUAL CORRECT ANSWERS
The larger the volume of a substance the more _______________ energy. - Correct
Answer ✔✔ Thermal
A __________________ is a substance that cannot be broken down to other
substances by chemical reactions. - Correct Answer ✔✔ Element
A ___________________ is a substance consisting of two or more elements in a fixed
ratio. - Correct Answer ✔✔ Compound
A change in characteristics when elements combine to form a compound is an example
of... - Correct Answer ✔✔ Emergent Property
What are the 20-25% of the 92 natural elements are required for life? - Correct Answer
✔✔ Essential Elements
__________ _______________ are required by an organism in only minute quantities. -
Correct Answer ✔✔ Trace Elements
_______________ is the measure of mass for atoms and subatomic particles; the same
as the atomic mass unit, or amu. - Correct Answer ✔✔ Dalton
___________ is the smallest unit of matter that still retains the properties of an element.
- Correct Answer ✔✔ Atom
An element's _____________ _______________ is the number of protons in its
nucleus. - Correct Answer ✔✔ Atomic Number
Protons + Neutrons = - Correct Answer ✔✔ Mass Number/Atomic Mass
________________ are two atoms of an element that differ in the number of neutrons. -
Correct Answer ✔✔ Isotopes
___________________ ______________ decay spontaneously, giving off particles and
energy. - Correct Answer ✔✔ Radioactive Isotopes
What are uses of Radioactive Isotopes? - Correct Answer ✔✔ Radioactive isotopes
have many applications in biological research.
Radioactive decay rates can be used to date fossils.
, Radioactive isotopes are also used to diagnose medical disorders.
____________ is the capacity to cause change. - Correct Answer ✔✔ Energy
________________ __________ is the energy that matter possesses because of its
location or structure. - Correct Answer ✔✔ Potential Energy
The ______________ electrons are from the nucleus, the more potential energy they
have. - Correct Answer ✔✔ farther
The different states of potential energy of the electrons of an atom are called
_________________ ___________. - Correct Answer ✔✔ Electron Shells
___________________ electrons are those in the outermost shell. - Correct Answer
✔✔ Valence
An ___________ is the three dimensional space where an electron is found 90% of the
time. - Correct Answer ✔✔ Orbital
No more than _____ electrons can occupy a single orbital. - Correct Answer ✔✔ 2
Atoms with incomplete valence shells can share or transfer valence electrons with
certain other atoms. These interactions usually result in atoms staying close together,
held by attractions called _________________ __________. - Correct Answer ✔✔
Chemical Bonds
A _______________ ________ is the sharing of a pair of valence electrons by two
atoms. - Correct Answer ✔✔ Covalent Bond
A ________________ consists of two or more atoms held together by covalent bonds. -
Correct Answer ✔✔ molecule
Bonding capacity is called the atom's ______________. - Correct Answer ✔✔ Valence
________________________ is an atom's attraction for the electrons in a covalent
bond. - Correct Answer ✔✔ Electronegativity
In a ______________ ______________ bond, the atoms share the electron equally. -
Correct Answer ✔✔ Nonpolar Covalent
In a _________ ________________ bond, one atom is more electronegative, and the
atoms do not share the electron equally. - Correct Answer ✔✔ Polar Covalent
Atoms sometimes strip electrons from their bonding partners.
The two resulting oppositely charged atoms or molecules are called ________. -
Correct Answer ✔✔ Ions
BHATTACHARYA) QUESTIONS &
ACTUAL CORRECT ANSWERS
The larger the volume of a substance the more _______________ energy. - Correct
Answer ✔✔ Thermal
A __________________ is a substance that cannot be broken down to other
substances by chemical reactions. - Correct Answer ✔✔ Element
A ___________________ is a substance consisting of two or more elements in a fixed
ratio. - Correct Answer ✔✔ Compound
A change in characteristics when elements combine to form a compound is an example
of... - Correct Answer ✔✔ Emergent Property
What are the 20-25% of the 92 natural elements are required for life? - Correct Answer
✔✔ Essential Elements
__________ _______________ are required by an organism in only minute quantities. -
Correct Answer ✔✔ Trace Elements
_______________ is the measure of mass for atoms and subatomic particles; the same
as the atomic mass unit, or amu. - Correct Answer ✔✔ Dalton
___________ is the smallest unit of matter that still retains the properties of an element.
- Correct Answer ✔✔ Atom
An element's _____________ _______________ is the number of protons in its
nucleus. - Correct Answer ✔✔ Atomic Number
Protons + Neutrons = - Correct Answer ✔✔ Mass Number/Atomic Mass
________________ are two atoms of an element that differ in the number of neutrons. -
Correct Answer ✔✔ Isotopes
___________________ ______________ decay spontaneously, giving off particles and
energy. - Correct Answer ✔✔ Radioactive Isotopes
What are uses of Radioactive Isotopes? - Correct Answer ✔✔ Radioactive isotopes
have many applications in biological research.
Radioactive decay rates can be used to date fossils.
, Radioactive isotopes are also used to diagnose medical disorders.
____________ is the capacity to cause change. - Correct Answer ✔✔ Energy
________________ __________ is the energy that matter possesses because of its
location or structure. - Correct Answer ✔✔ Potential Energy
The ______________ electrons are from the nucleus, the more potential energy they
have. - Correct Answer ✔✔ farther
The different states of potential energy of the electrons of an atom are called
_________________ ___________. - Correct Answer ✔✔ Electron Shells
___________________ electrons are those in the outermost shell. - Correct Answer
✔✔ Valence
An ___________ is the three dimensional space where an electron is found 90% of the
time. - Correct Answer ✔✔ Orbital
No more than _____ electrons can occupy a single orbital. - Correct Answer ✔✔ 2
Atoms with incomplete valence shells can share or transfer valence electrons with
certain other atoms. These interactions usually result in atoms staying close together,
held by attractions called _________________ __________. - Correct Answer ✔✔
Chemical Bonds
A _______________ ________ is the sharing of a pair of valence electrons by two
atoms. - Correct Answer ✔✔ Covalent Bond
A ________________ consists of two or more atoms held together by covalent bonds. -
Correct Answer ✔✔ molecule
Bonding capacity is called the atom's ______________. - Correct Answer ✔✔ Valence
________________________ is an atom's attraction for the electrons in a covalent
bond. - Correct Answer ✔✔ Electronegativity
In a ______________ ______________ bond, the atoms share the electron equally. -
Correct Answer ✔✔ Nonpolar Covalent
In a _________ ________________ bond, one atom is more electronegative, and the
atoms do not share the electron equally. - Correct Answer ✔✔ Polar Covalent
Atoms sometimes strip electrons from their bonding partners.
The two resulting oppositely charged atoms or molecules are called ________. -
Correct Answer ✔✔ Ions
