WGUC190 Intro to Biology Unit 2 Exam Questions and Answers
with Verified Solutions | Latest 2026 Update
Q: Electrons
Answer:
Negatively charged particles that orbit outside of the nucleus in shells; shells fill
following a specific pattern( 2 in the first shell, 8 in the next) relative mass:
negligible or 0.
Q: Ion
Answer:
An atom with a positive or a negative charge.
Q: Element
Answer:
is a substance that is composed of a single type of atom.
Q: Atomic Mass
Answer:
the sum of the number of protons and the number of neutrons.
Q: Covalent bond
Answer:
Strong. Occurs between atoms in the same molecule, Electron pairs are shared,
creating a strong bond between atoms.
Q: Ionic Bond
Answer:
Moderately strong. Occurs between charged atoms (ions). Electron transfer from
one atom to another, resulting in a moderately strong electrostatic attraction
between oppositely charged ions.
Q: Hydrogen Bond
Answer:
Weak. Occurs between atoms in different molecules or parts of molecules. Weak
electrostatic attraction between areas of molecules with opposite partial charges.
, Q: 4 properties of water
Answer:
1) excellent solvent and can dissolve a wide range of substances.
it is cohesive.
water's temperature tends to remain stable.
solid water (ice) is less dense than liquid water.
Q: solvent
Answer:
the component of the solution in the greatest quantity.
Q: Solutes
Answer:
The components present in lower quantities.
Q: Hydrophilic
Answer:
water loving
Q: hydrophobic
Answer:
water-fearing or water-hating.
Q: Cohesion
Answer:
Attraction between molecules of the same substance
Q: surface tension
Answer:
the capacity of a liquid's surface to resist being ruptured when placed under tension
or stress.
Q: adhesion
Answer:
the attraction between water molecules and other molecules.
with Verified Solutions | Latest 2026 Update
Q: Electrons
Answer:
Negatively charged particles that orbit outside of the nucleus in shells; shells fill
following a specific pattern( 2 in the first shell, 8 in the next) relative mass:
negligible or 0.
Q: Ion
Answer:
An atom with a positive or a negative charge.
Q: Element
Answer:
is a substance that is composed of a single type of atom.
Q: Atomic Mass
Answer:
the sum of the number of protons and the number of neutrons.
Q: Covalent bond
Answer:
Strong. Occurs between atoms in the same molecule, Electron pairs are shared,
creating a strong bond between atoms.
Q: Ionic Bond
Answer:
Moderately strong. Occurs between charged atoms (ions). Electron transfer from
one atom to another, resulting in a moderately strong electrostatic attraction
between oppositely charged ions.
Q: Hydrogen Bond
Answer:
Weak. Occurs between atoms in different molecules or parts of molecules. Weak
electrostatic attraction between areas of molecules with opposite partial charges.
, Q: 4 properties of water
Answer:
1) excellent solvent and can dissolve a wide range of substances.
it is cohesive.
water's temperature tends to remain stable.
solid water (ice) is less dense than liquid water.
Q: solvent
Answer:
the component of the solution in the greatest quantity.
Q: Solutes
Answer:
The components present in lower quantities.
Q: Hydrophilic
Answer:
water loving
Q: hydrophobic
Answer:
water-fearing or water-hating.
Q: Cohesion
Answer:
Attraction between molecules of the same substance
Q: surface tension
Answer:
the capacity of a liquid's surface to resist being ruptured when placed under tension
or stress.
Q: adhesion
Answer:
the attraction between water molecules and other molecules.
