Biology 1201 Exam 1 (LSU Dr. Bhattacharya)
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
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
