BIO-100 EXAM 5 2025 QUESTIONS
AND ANSWERS
elements - ....ANSWER ...-substances that cannot be broken down into
simpler substances by chemical reactions
92 - ....ANSWER ...-There are ___ naturally occurring elements
atomic number - ....ANSWER ...-Signifies the number of protons an element
has on the periodic table
atomic weight - ....ANSWER ...-Signifies the number of protons + the
number of neutrons an element has on the periodic table
neutrons - ....ANSWER ...-Atomic weight often appears as a decimal
because it averages all naturally occurring forms of the element, which vary in
number of ____
25 - ....ANSWER ...-How many of the naturally occurring elements are used
by the human body?
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,carbon, oxygen, hydrogen, nitrogen - ....ANSWER ...-Name the four
elements that make up the majority of living matter.
trace elements - ....ANSWER ...-14 elements such as zinc and iron which the
body requires only in very small amounts
protons and neutrons - ....ANSWER ...-Which two atoms located in the
nucleus have about the same mass?
electron shells - ....ANSWER ...-specific locations in which electrons rotate
around the nucleus
These interactions determine the chemical bonds of the atom -
....ANSWER ...-What is the significance of electrons in the outer shell
interacting with electrons of other atoms?
Isotopes - ....ANSWER ...-Atoms of the same element that have different
numbers of neutrons
Ions - ....ANSWER ...-positively and negatively charged atoms (the atom
having added electrons to or lost electrons from its electron cloud)
neutral - ....ANSWER ...-Atoms are electrically ____
extra - ....ANSWER ...-N3- carries three ____ electrons
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, Ionic bond - ....ANSWER ...-transfer of electrons from one atom to another;
both ions then held together by attraction of opposite charge
covalent bond - ....ANSWER ...-each atom shares one electron with the
other, forming a pair; this type of bond holds atoms together within molecules
polar - ....ANSWER ...-When the sharing of electrons in a covalent bond is
unequal, the bond is ____
Overall neutral, with one positive pole and one negative pole -
....ANSWER ...-Describe the charge of a molecule created by a polar
covalent bond.
hydrogen bond - ....ANSWER ...-weak chemical bond of one partially
positive hydrogen atom to a partially negative atom from another polar molecule;
networks of this type of bond are strong enough to form liquid water
organic compounds - ....ANSWER ...-molecules that contain carbon bonded
to other elements; make up most living matter (after water)
carbon; four - ....ANSWER ...-Which element forms the skeleton of organic
compounds? With how many other atoms can it bond?
functional groups - ....ANSWER ...-sets of atoms attached to the carbon
skeleton which determine the chemical properties of the organic compound
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AND ANSWERS
elements - ....ANSWER ...-substances that cannot be broken down into
simpler substances by chemical reactions
92 - ....ANSWER ...-There are ___ naturally occurring elements
atomic number - ....ANSWER ...-Signifies the number of protons an element
has on the periodic table
atomic weight - ....ANSWER ...-Signifies the number of protons + the
number of neutrons an element has on the periodic table
neutrons - ....ANSWER ...-Atomic weight often appears as a decimal
because it averages all naturally occurring forms of the element, which vary in
number of ____
25 - ....ANSWER ...-How many of the naturally occurring elements are used
by the human body?
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,carbon, oxygen, hydrogen, nitrogen - ....ANSWER ...-Name the four
elements that make up the majority of living matter.
trace elements - ....ANSWER ...-14 elements such as zinc and iron which the
body requires only in very small amounts
protons and neutrons - ....ANSWER ...-Which two atoms located in the
nucleus have about the same mass?
electron shells - ....ANSWER ...-specific locations in which electrons rotate
around the nucleus
These interactions determine the chemical bonds of the atom -
....ANSWER ...-What is the significance of electrons in the outer shell
interacting with electrons of other atoms?
Isotopes - ....ANSWER ...-Atoms of the same element that have different
numbers of neutrons
Ions - ....ANSWER ...-positively and negatively charged atoms (the atom
having added electrons to or lost electrons from its electron cloud)
neutral - ....ANSWER ...-Atoms are electrically ____
extra - ....ANSWER ...-N3- carries three ____ electrons
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, Ionic bond - ....ANSWER ...-transfer of electrons from one atom to another;
both ions then held together by attraction of opposite charge
covalent bond - ....ANSWER ...-each atom shares one electron with the
other, forming a pair; this type of bond holds atoms together within molecules
polar - ....ANSWER ...-When the sharing of electrons in a covalent bond is
unequal, the bond is ____
Overall neutral, with one positive pole and one negative pole -
....ANSWER ...-Describe the charge of a molecule created by a polar
covalent bond.
hydrogen bond - ....ANSWER ...-weak chemical bond of one partially
positive hydrogen atom to a partially negative atom from another polar molecule;
networks of this type of bond are strong enough to form liquid water
organic compounds - ....ANSWER ...-molecules that contain carbon bonded
to other elements; make up most living matter (after water)
carbon; four - ....ANSWER ...-Which element forms the skeleton of organic
compounds? With how many other atoms can it bond?
functional groups - ....ANSWER ...-sets of atoms attached to the carbon
skeleton which determine the chemical properties of the organic compound
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