Bio II Ch. 2 Groupwork Assignment
True/False Indicate whether the
statement is true or false.
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1.
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Living and nonliving material are made up of elements.
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2.
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Protons and neutrons are roughly equal in weight.
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3.
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Protons and electrons are roughly equal in weight.
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4.
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Protons and electrons are equal in their power of charge.
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5.
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Atoms have potential energy.
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6.
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Protons are the only subatomic particle found in the nucleus.
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7.
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All covalent bonds share only one electron.
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8.
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Water is a polar molecule.
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9.
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If it wasn’t for hydrogen bonding, our blood would boil at room
temperature.
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10.
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Liquid water is less dense than ice.
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11.
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0-7 on the pH scale refers to a solution being basic.
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12.
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If something is considered neutral, it has an equal number of acids and
bases.
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13.
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Water is a great dissolver of non-polar molecules.
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14.
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Most of water’s unique properties are due to hydrogen bonding.
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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15.
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There are _____ naturally occuring elements.
a. | 22 | e. | 62 | b. | 32 | f. | 72 | c. | 42 | g. | 82 | d. | 52 | h. | 92 |
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16.
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The first shell of an atom can hold a maximum of ______ electrons.
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17.
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The second shell of atom can hold a maximum of _____ electrons.
a. | 2 | e. | 16 | b. | 4 | f. | 18 | c. | 8 | g. | 32 | d. | 10 | h. | 64 |
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18.
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The third shell of an electron can hold a maximum of _____
electrons
a. | 2 | e. | 18 | b. | 4 | f. | 32 | c. | 8 | g. | 64 | d. | 16 | h. | 128 |
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19.
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The first shell of an atom is named
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20.
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The second shell of an atom is named
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21.
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The third shell of an atom is named
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22.
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Which one of these is not one of the seven common elements found in living
organisms?
a. | O | e. | P | b. | H | f. | C | c. | S | g. | Si | d. | Ca | h. | N |
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23.
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What is the atomic number of an atom?
a. | the total number of neutrons in an atom | b. | the total number of
protons and neutrons in an atom | c. | the total number of protons and electrons in an
atom | d. | the total number of electrons in an atom | e. | the total number of
neutrons and electrons in an atom | f. | the total number of protons, neutrons, and
electrons in an atom | g. | the total number of protons in an
atom | h. | the total number of electrons the atom can share or
donate |
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24.
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What is the atomic weight or mass number of an atom?
a. | the number of protons in an atom | b. | the number of neutrons in an
atom | c. | the total number of protons and neutrons in an atom | d. | the number of
electrons in an atom | e. | the number of protons, nutrons, and electrons
in an atom | f. | the total number of protons and electrons in an atom | g. | the total number of
electrons an atom can donate or share | h. | the total number of neutrons and electrons in
an atom |
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25.
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How can I create an isotope?
a. | add or take away protons | b. | add or take away neutrons | c. | add or take away
electrons | d. | add or take away protons and neutrons | e. | add or take away protons and
electrons | f. | add or take away protons, neutrons, and electrons | g. | add or take away
neutrons and electrons | h. | make sure the outer shell is
full |
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26.
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Electrons weigh about 1/_____________ of a proton
a. | 100 | e. | 1,600 | b. | 500 | f. | 1,700 | c. | 1,000 | g. | 1,800 | d. | 1,500 | h. | 1,900 |
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27.
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Isotopes are radioactive. In other words, they emit subatomic bullets. Which is
not a use for isotopes?
a. | tracers for medicine | b. | radiocarbon dating | c. | tracers for
biochemical steps | d. | energy source |
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28.
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C6H12O6 is a ________________ formula
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29.
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How can I create an ion?
a. | add or take away protons | b. | add or take away neutrons | c. | add or take away
electrons | d. | add or take away protons and neutrons | e. | add or take away protons and
electrons | f. | add or take away neutrons and electrons | g. | add or take away
protons, neutrons, and electrons | h. | make sure the outer shell is
empty |
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30.
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Which is an unequal sharing of electrons?
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31.
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Why is water a great solvent?
a. | because it is a neutral molecule | b. | because the molecule is evenly balanced with
atoms | c. | because of waters polarity | d. | because of its small size | e. | because of waters
resistance to change states | f. | because of waters high surface
tension | g. | because of waters cohesiveness | h. | because of waters resistance to temperature
change |
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32.
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The difference in the hydrogen ion concentration between 8 and 12 on the pH
scale is
a. | 1X | e. | 10,000X | b. | 10X | f. | 100,000X | c. | 100X | g. | 1,000,000X | d. | 1,000X | h. | 10,000,000X |
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33.
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Which is not a unique property of water?
a. | universal solvent | e. | resists changes in temperature | b. | adhesive | f. | has a high surface tension | c. | less dense as ice than as liquid
water | g. | produces
energy | d. | resists changes of state | h. | cohesive |
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Multiple Response Identify one
or more choices that best complete the statement or answer the question.
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34.
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Which are the three basic forms of matter.
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35.
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Choose the orbitals of the second energy level.
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36.
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H
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37.
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H2
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38.
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H2O
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Completion Complete each
statement using the following word bank. Some are used more than
once! acids
adhesive
atoms
bases
buffers
cohesive covalent
dumbbell elements
energy fourteen full outer
shell H+
hydrogen hydrophilic
hydrophobic gaining
ionic kinetic
losing matter
neutral octet rule
OH- orbital polar
covalent potential
seven spherical
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39.
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__________________ is anything that takes up space and has mass.
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40.
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Elements are made up of ________________.
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41.
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All atoms are electrically _____________.
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42.
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Matter is composed of ____________.
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43.
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The third shell can be satisfied, happy, or stable with eight electrons. What is
this rule called?
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44.
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_________________ is the ability to do work.
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45.
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An _________________ is the volume of space where a rapidly moving electron is
going bezerk.
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46.
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Energy which is being used is called _________ energy.
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47.
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Energy which is being stored is called ___________ energy.
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48.
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The first electron orbital is ___________ in shape.
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49.
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The term oxidation refers to ________ an electron.
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50.
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The term reduction refers to __________ an electron.
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51.
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The second shell has one sherical shape orbital and three ______________ shaped
orbitals.
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52.
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Atoms bond in a variety of ways. If they gain or lose electrons, it is called
_______________ bonding.
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53.
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Atoms bond in a variety of ways. If an atom shares electrons, it called a
______________ bond.
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54.
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Atoms bond in a variety of ways. If molecules are attracted by a weak pull,
because of the attraction of the slight polar charges of H, then it is called a ____________________
bond.
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55.
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Atoms bond in a variety of ways. If there is an unequal sharing of electrons, it
called a ________________ bond.
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56.
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The term oxidation refers to ___________________ an electron.
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57.
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The term reduction refers to ___________________ an electron.
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58.
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All atoms want or strive to attain a _______________________.
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59.
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What is the chemical symbol for a hydrogen ion?
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60.
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What is the chemical symbol for a hydroxide ion?
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61.
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The numbers on a pH scale range from 0 to _____.
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62.
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The number ____ on the pH scale is considered neutral.
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63.
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What do we have in our body that prevents our pH from becoming too acidic or too
basic?
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64.
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Water molecules stick to other water molecules because they are
_______________.
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65.
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Water molecules, being polar, can stick to other substances because it is
_________________.
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66.
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____________ are molecules that dissociate in water and release hydrogen
ions.
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67.
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______________ are molecules that either take up hydrogen ions or release
hydroxide ions.
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68.
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Molecules that can attract water are said to be ________________.
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69.
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Molecules that are not attracted to water are said to be
_________________.
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Matching
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a. | protons | c. | electrons | b. | neutrons |
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70.
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positive charge
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71.
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negative charge
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72.
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no charge
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73.
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found orbiting the nucleus
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a. | structural formula for water | c. | molecular formula for
water | b. | structural formula for carbon dioxide | d. | molecular formula for carbon
dioxide |
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74.
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CO2
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75.
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O=C=O
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76.
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H-O-H
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77.
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H2O
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