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AP Biology Unit 1&2; Questions & Answers Latest Update 100% Solved

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AP Biology Unit 1&2; Questions & Answers Latest Update 100% Solved Unit one: The Chemistry of Life Chapter 2: The Chemical Context of life Matter Correct answer-Anything that takes up space and has mass. Element Correct answer-Substance that cannot be broken down to other substances throug...

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  • August 8, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • ap biology unit 12 questions answers

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AP Biology Unit 1&2; Questions & Answers Latest
Update 100% Solved

Unit one: The Chemistry of Life

Chapter 2: The Chemical Context of life



Matter Correct answer-Anything that takes up space and has mass.




Element Correct answer-Substance that cannot be broken down to other substances
through chemical reactions. Each has a symbol. 92 occurring in nature.




Compound Correct answer-Substance consisting of two or more different elements
combined in a fixed ratio.

*Characteristics different than those of its elements




CHON Correct answer-4 elements essential to life




Trace Elements Correct answer-Required by an organism only in minute quantities.




Atom Correct answer-Smallest unit of matter that retains the properties of an element.
Composed of subatomic particles. Mostly empty space.




Subatomic particles Correct answer-Neutrons, protons, electrons. Make up atoms.

, AP Biology Unit 1&2; Questions & Answers Latest
Update 100% Solved

Proton Correct answer-One unit of positive charge. Approximately one dalton. Located in
nucleus.




Electron Correct answer-One unit of negative charge. Located outside of nucleus.




Atomic Nucleus Correct answer-Dense core packed with protons and neutrons.




Neutrons Correct answer-Electrically neutral. Approximately one dalton.




Atomic Number Correct answer-The number of protons (which is unique to that element)
and written as a subscript to left of element symbol. Also tells us number of electrons since P=E
if atom is neutral




Mass Number Correct answer-Sum of the protons and the neutrons. An approximation of
the atomic mass.




Isotopes Correct answer-Same number of protons, but different number of neutrons and
therefore different mass. Same element.




Radioactive Isotope Correct answer-One in which the nucleus decays spontaneously,
giving off particles and energy. Can decay to a different element. Have useful applications.

, AP Biology Unit 1&2; Questions & Answers Latest
Update 100% Solved

Energy Correct answer-Capacity to cause change




Potential Energy Correct answer-Energy matter possesses because of its location or
structure. Electrons have this based on distance from nucleus.




Electron Shells Correct answer-Where electrons are found, each with characteristic
average distance and energy level. Electrons can change these by absorbing or losing energy.




Valence Electrons Correct answer-Electrons in the outermost shell.




Chemical Bonds Correct answer-The attraction that holds atoms together during an
interaction.




Covalent Bond Correct answer-Sharing of a pair of valence electrons by two atoms.




Molecule Correct answer-Two or more atoms held together by covalent bonds.




Single Bond Correct answer-One pair of shared electrons.




Structural Formula Correct answer-H--H. Notation which represents both atoms and
bonding.

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