CAMPBELL BIOLOGY CHAPTERS 1 & 2 QUESTIONS WITH 100%
CORRECT DETAILED ANSWERS LATEST UPDATED 2025/2026 A
COMPLETE EXAM BEST GRADED A+ FOR SUCCESS
Atom - CORRECT ANSWERS The smallest unit of matter that still retains the properties
of an element
Subatomic particles - CORRECT ANSWERS Tiny bits of matter that make up an atom
True or false: protons and electrons are electrically charged - CORRECT ANSWERS True
What kind of charge does a neutron have? - CORRECT ANSWERS Neutral
What kind of charge does a proton have? - CORRECT ANSWERS Positive
What kind of charge does an electron have? - CORRECT ANSWERS Negative
Protons and neutrons are packed together tightly in a dense core called a(n)
_________________ at the center of an atom. - CORRECT ANSWERS Atomic nucleus
Dalton - CORRECT ANSWERS The unit we use to measure atoms and subatomic
particles
True or false: neutrons and protons have a mass close to one dalton - CORRECT
ANSWERS True
True or false: electrons have a mass greater than one dalton - CORRECT ANSWERS
False, the mass of an electron is only about 1/2,000 of that of a neutron or proton, so we ignore
the mass of electrons when calculating the total mass of an atom.
, CAMPBELL BIOLOGY CHAPTERS 1 & 2 QUESTIONS WITH 100%
CORRECT DETAILED ANSWERS LATEST UPDATED 2025/2026 A
COMPLETE EXAM BEST GRADED A+ FOR SUCCESS
What does an element's atomic number tell us? - CORRECT ANSWERS The number of
protons in the element (unique to that element)
What does an element's mass number tell us? - CORRECT ANSWERS The sum of
protons plus neutrons in the nucleus of an atom
What does an element's atomic mass tell us? - CORRECT ANSWERS The approximation
of the total mass of an atom
Isotopes - CORRECT ANSWERS Different atomic forms of the same element, due to a
differing number of neutrons
Radioactive isotopes - CORRECT ANSWERS An isotope in which the nucleus decays
spontaneously, giving off particles and energy
True or false: when radioactive decay leads to a change in the number of protons, it transforms
the atom to an atom of a different element - CORRECT ANSWERS True
Half-life - CORRECT ANSWERS The time it takes for 50% of a parent isotope to decay
Radiometric dating - CORRECT ANSWERS A process through which scientists measure
the ratio of different isotopes and calculate how many half-lives have passed since an organism
was fossilized or a rock was formed
Energy - CORRECT ANSWERS The capacity to cause change
Potential energy - CORRECT ANSWERS The energy that matter possesses because of its
location or structure
CORRECT DETAILED ANSWERS LATEST UPDATED 2025/2026 A
COMPLETE EXAM BEST GRADED A+ FOR SUCCESS
Atom - CORRECT ANSWERS The smallest unit of matter that still retains the properties
of an element
Subatomic particles - CORRECT ANSWERS Tiny bits of matter that make up an atom
True or false: protons and electrons are electrically charged - CORRECT ANSWERS True
What kind of charge does a neutron have? - CORRECT ANSWERS Neutral
What kind of charge does a proton have? - CORRECT ANSWERS Positive
What kind of charge does an electron have? - CORRECT ANSWERS Negative
Protons and neutrons are packed together tightly in a dense core called a(n)
_________________ at the center of an atom. - CORRECT ANSWERS Atomic nucleus
Dalton - CORRECT ANSWERS The unit we use to measure atoms and subatomic
particles
True or false: neutrons and protons have a mass close to one dalton - CORRECT
ANSWERS True
True or false: electrons have a mass greater than one dalton - CORRECT ANSWERS
False, the mass of an electron is only about 1/2,000 of that of a neutron or proton, so we ignore
the mass of electrons when calculating the total mass of an atom.
, CAMPBELL BIOLOGY CHAPTERS 1 & 2 QUESTIONS WITH 100%
CORRECT DETAILED ANSWERS LATEST UPDATED 2025/2026 A
COMPLETE EXAM BEST GRADED A+ FOR SUCCESS
What does an element's atomic number tell us? - CORRECT ANSWERS The number of
protons in the element (unique to that element)
What does an element's mass number tell us? - CORRECT ANSWERS The sum of
protons plus neutrons in the nucleus of an atom
What does an element's atomic mass tell us? - CORRECT ANSWERS The approximation
of the total mass of an atom
Isotopes - CORRECT ANSWERS Different atomic forms of the same element, due to a
differing number of neutrons
Radioactive isotopes - CORRECT ANSWERS An isotope in which the nucleus decays
spontaneously, giving off particles and energy
True or false: when radioactive decay leads to a change in the number of protons, it transforms
the atom to an atom of a different element - CORRECT ANSWERS True
Half-life - CORRECT ANSWERS The time it takes for 50% of a parent isotope to decay
Radiometric dating - CORRECT ANSWERS A process through which scientists measure
the ratio of different isotopes and calculate how many half-lives have passed since an organism
was fossilized or a rock was formed
Energy - CORRECT ANSWERS The capacity to cause change
Potential energy - CORRECT ANSWERS The energy that matter possesses because of its
location or structure
