Bio 114 Test 1 University of Alabama Questions and Correct Answers
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Course
BIO 114
Institution
BIO 114
What are the 3 Domains? Eubacteria, Eukaryote, Archaea
What are the 4 kingdoms in Eukarya? Protista, Fungi, Animalia, Plantae
What is an Atom? The basic unit of a chemical element
What are atoms composed of? Protons, neutrons, electrons
What is an ion? an atom or molecule with a net electric ch...
Bio 114 Test 1 University of Alabama
Questions and Correct Answers
What are the 3 Domains? ✅Eubacteria, Eukaryote, Archaea
What are the 4 kingdoms in Eukarya? ✅Protista, Fungi, Animalia, Plantae
What is an Atom? ✅The basic unit of a chemical element
What are atoms composed of? ✅Protons, neutrons, electrons
What is an ion? ✅an atom or molecule with a net electric charge due to the loss or
gain of one or more electrons
Ion vs. Isotope? ✅An isotope of an element means that it has all of the same qualities
of a regular atom of that element but it has a different amount of neutrons in the
nucleus. An ion means that it has a net electrical charge electrical charge due to the
amount of electrons it has.
Stable atom? ✅A stable atom is an atom that has enough binding energy to hold the
nucleus together permanently.
Trace element? ✅In biochemistry, a trace element is a dietary mineral that is needed
in very minute quantities for the proper growth, development, and physiology of the
organism
Radioactive isotope? ✅An isotope having an unstable nucleus that decomposes
spontaneously by emission of a nuclear electron or helium nucleus and radiation, thus
achieving a stable nuclear composition.
Radioactive Isotope vs. Regular Isotope? ✅isotopes differ only by the number of
neutrons. It is radioactive (unstable) usually when it has too many neutrons in its
nucleus. So it must "decay" by losing a neutron to stabilize itself.
isotopes and fossils relation? ✅Use carbon isotopes in fossil dating
Energy is? ✅the strength and vitality required for sustained physical or mental activity
atoms energy is? ✅Orbits, electrons
Atoms are stable because ✅theres a balanced nucleus
, Electron shells 1,2,3 contain how many electrons? ✅2,8,8
Stable vs neutral atom? ✅A chemically stable atom has a full outer shell of electrons.
Therefore, it is stable and does not react with other atoms that it encounters
Atomic number vs atomic mass ✅The Atomic number is the number of protons in an
atom. The mass number is found by taking the sum of all of the protons and neutrons in
an atom and adding them together.
A molecule is? ✅an electrically neutral group of two or more atoms held together by
chemical bonds.
Chemical Bond types? ✅The three types of chemical bonds are Ionic bonds, Covalent
bonds, and Polar covalent bonds.
Fromation of chemical bonds? ✅Ionic- attraction of oppositely charged atoms
Covalent-sharing of electrons between two atoms with similar electronegativities A
single covalent bond represent the sharing of two valence electrons (usually from two
different atoms)
Hydrogen-Hydrogen bonds only form between hydrogen and oxygen (O), nitrogen (N)
or fluorine (F).
Why is the chemistry of life water chemistry? ✅All organisms are composed of water
Arrow represent in chemical reaction? ✅The reaction arrow is used most frequently
and indicates a re action occurring from the
reactants to the products
Before and after arrow? ✅Reactants and Products
Why can water absorb alot of heat? ✅This is because for water to increase in
temperature, water molecules must be made to move faster within the water; this
requires breaking hydrogen bonds, and the breaking of hydrogen bonds absorbs heat.
Why does ice float? ✅As water is cooled down, however, the molecules have less
energy and hydrogen bonding takes over. The molecules form a ordered crystal through
hydrogen bonding that spaces the molecules farther apart than when they were in a
liquid. This makes ice less dense than water allowing it to float.
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