1
BSC114-Exam 1 Questions with Answers (100% Correct
Answers)
Element Answer: what all biological matter is composed of, cannot be
broken down by chemical reactions
Atomic Number Answer: number of protons
Atomic Mass Answer: number of protons and neutrons
Compound Answer: two or more elements forming bonds together,
has characteristics different than the elements in the compound
Essential Elements Answer: elements that are essential for life:
Oxygen, Carbon, Hydrogen & Nitrogen
Trace Elements Answer: elements required by an organism in small
quantities: Calcium, Phosphorous, Potassium, Sulfur, Sodium,
Chlorine, Magnesium
Subatomic Particles Answer: Protons: positive charge, Neutrons: no
charge, Electrons: negative charge
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,2
Which subatomic particles form the atomic nucleus? Answer:
Neutrons & Protons
Electron Shell Answer: space around the nucleus where the electrons
are
Number of Protons = Number of _____ Answer: Electrons
Isotopes Answer: atoms that have the same amount of protons, but a
different amount of neutrons, changes the atomic mass, can be stable &
unstable
Why do the electrons of an atom have potential energy? Answer:
because of the way they are arranged in relation to the nucleus-
negatively charged electrons of an atom are attracted to the positively
charged nucleus, the more distance between an electron and the
nucleus, the greater its potential energy
What makes an atom stable? Answer: a full outer shell of electrons
Valence Electrons Answer: those in the outermost shell (valence shell),
what forms bonds with other atoms
Covalent Bonds Answer: strong bonds resulting from the sharing of
valence electrons
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, 3
Polar Covalent Bonds Answer: valence electrons are not shared
equally between atoms
Non Polar Covalent Bonds Answer: valence electrons are shared
equally between atoms, causes partial positive and partial negative
charges
Ionic Bonds Answer: bonds resulting from loss or gain of electrons by
bonded atoms, the more electronegative atom strips a valence electron
away from its partner
Hydrogen Bonds Answer: bond formed between a hydrogen atom in a
polar compound and an electronegative atom in another polar
compound, polar covalent, causes partial positive and partial negative,
represented by a dotted line
Van Der Waals Force Answer: weak bonds resulting from transient
shifting of charges by the constant movement of electrons, dependent
on how much surface area one molecule exposes to its neighbor
Electronegativity Answer: atoms attraction for the electrons in a
chemical bond, affected by atomic number & distance from valence
electrons
© 2025 All rights reserved
BSC114-Exam 1 Questions with Answers (100% Correct
Answers)
Element Answer: what all biological matter is composed of, cannot be
broken down by chemical reactions
Atomic Number Answer: number of protons
Atomic Mass Answer: number of protons and neutrons
Compound Answer: two or more elements forming bonds together,
has characteristics different than the elements in the compound
Essential Elements Answer: elements that are essential for life:
Oxygen, Carbon, Hydrogen & Nitrogen
Trace Elements Answer: elements required by an organism in small
quantities: Calcium, Phosphorous, Potassium, Sulfur, Sodium,
Chlorine, Magnesium
Subatomic Particles Answer: Protons: positive charge, Neutrons: no
charge, Electrons: negative charge
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,2
Which subatomic particles form the atomic nucleus? Answer:
Neutrons & Protons
Electron Shell Answer: space around the nucleus where the electrons
are
Number of Protons = Number of _____ Answer: Electrons
Isotopes Answer: atoms that have the same amount of protons, but a
different amount of neutrons, changes the atomic mass, can be stable &
unstable
Why do the electrons of an atom have potential energy? Answer:
because of the way they are arranged in relation to the nucleus-
negatively charged electrons of an atom are attracted to the positively
charged nucleus, the more distance between an electron and the
nucleus, the greater its potential energy
What makes an atom stable? Answer: a full outer shell of electrons
Valence Electrons Answer: those in the outermost shell (valence shell),
what forms bonds with other atoms
Covalent Bonds Answer: strong bonds resulting from the sharing of
valence electrons
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, 3
Polar Covalent Bonds Answer: valence electrons are not shared
equally between atoms
Non Polar Covalent Bonds Answer: valence electrons are shared
equally between atoms, causes partial positive and partial negative
charges
Ionic Bonds Answer: bonds resulting from loss or gain of electrons by
bonded atoms, the more electronegative atom strips a valence electron
away from its partner
Hydrogen Bonds Answer: bond formed between a hydrogen atom in a
polar compound and an electronegative atom in another polar
compound, polar covalent, causes partial positive and partial negative,
represented by a dotted line
Van Der Waals Force Answer: weak bonds resulting from transient
shifting of charges by the constant movement of electrons, dependent
on how much surface area one molecule exposes to its neighbor
Electronegativity Answer: atoms attraction for the electrons in a
chemical bond, affected by atomic number & distance from valence
electrons
© 2025 All rights reserved
