CAMPBELL BIOLOGY ACTUAL TEST
QUESTIONS AND SOLUTIONS
COMPREHENSIVE REVIEW PACKAGE
●● Matter is made up of...
Answer: Elements
●● How many elements occur in nature?
Answer: 82
●● Compound
Answer: A substance consisting of 2 or more different elements
combined in a fixed ratio.
●● % of natural elements that are essential elements
Answer: 20-25%
●● 4 Major elements of living matter
Answer: Carbon Nitrogen Oxygen and Hydrogen
●● Atom
Answer: Smallest unit of matter this still retains properties of an element
,●● Atomic Nucleus
Answer: Proton and Neutron core
●● Atomic Number
Answer: Number of protons; Shown by left subscript
●● Mass number
Answer: # or protons + nutrons; Shown by left superscript
●● Isotope
Answer: When some atoms of the same element have a different number
of neutrons; Behave identically in chemical reactions;
●● Radioactive Isotope
Answer: The nucleus decays spontaneously, giving off particles and
energy.
●● Half life
Answer: The time it takes for 50% of the parent isotope to decay
●● Radiometric dating
, Answer: Measuring the ratio of different isotopes and calculate how
many half lives have passed
●● Energy
Answer: The capacity to cause change
●● Electron distance relating to potential energy
Answer: The farther away from the nucleus, the more potential energy
●● First electron shell
Answer: Holds only 2 electrons
●● Valence electrons
Answer: Electrons on the outermost shell
●● Valence Shell
Answer: The outer most electron shell
●● Inert elements
Answer: Have full valence shells so are chemically un-reactive
●● Covalent bond
QUESTIONS AND SOLUTIONS
COMPREHENSIVE REVIEW PACKAGE
●● Matter is made up of...
Answer: Elements
●● How many elements occur in nature?
Answer: 82
●● Compound
Answer: A substance consisting of 2 or more different elements
combined in a fixed ratio.
●● % of natural elements that are essential elements
Answer: 20-25%
●● 4 Major elements of living matter
Answer: Carbon Nitrogen Oxygen and Hydrogen
●● Atom
Answer: Smallest unit of matter this still retains properties of an element
,●● Atomic Nucleus
Answer: Proton and Neutron core
●● Atomic Number
Answer: Number of protons; Shown by left subscript
●● Mass number
Answer: # or protons + nutrons; Shown by left superscript
●● Isotope
Answer: When some atoms of the same element have a different number
of neutrons; Behave identically in chemical reactions;
●● Radioactive Isotope
Answer: The nucleus decays spontaneously, giving off particles and
energy.
●● Half life
Answer: The time it takes for 50% of the parent isotope to decay
●● Radiometric dating
, Answer: Measuring the ratio of different isotopes and calculate how
many half lives have passed
●● Energy
Answer: The capacity to cause change
●● Electron distance relating to potential energy
Answer: The farther away from the nucleus, the more potential energy
●● First electron shell
Answer: Holds only 2 electrons
●● Valence electrons
Answer: Electrons on the outermost shell
●● Valence Shell
Answer: The outer most electron shell
●● Inert elements
Answer: Have full valence shells so are chemically un-reactive
●● Covalent bond
