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Home / BIOL 103 Quizzes / BIOL 103 Module 11 Unit Summary Introduction to Chemistry
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Unit Assessment: Introduction to Chemistry Quiz 2

Question 1

Chemistry

Neon has an atomic number of 10 and an atomic mass of approximately 20. How many neutrons does neon have?

  • 10
  • 20
  • 5
  • 30

Question 2

Which is the biggest?

  • Electron
  • Atom
  • Neutron
  • Proton

Question 3

Gold is abbreviated Au in the periodic table.

What is the atomic mass of gold?

  • 79
  • 197
  • 118
  • 276

Question 4

Fluorine, F, has an atomic number of 9 and an approximate atomic mass of 19. How many protons does a fluorine atom have?

  • 9
  • 19
  • 28
  • 10

Question 5

The lines on the above drawing of caffeine indicate:

  • Covalent bonds
  • Hydrogen bonds
  • Ionic bonds
  • Polar bonds

Question 6

The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. This attraction is called:

  • a covalent bond
  • a hydrogen bond
  • an ionic bond

Question 7

A double covalent bond is the sharing of a total of how many electrons?

  • 4
  • 2
  • 6
  • 8

Question 8

What determines the number of covalent bonds formed by an atom?

  • Orbitals found in the atom
  • Electrons in the outer valence shell of the atom
  • Electrons in each orbital of the atom
  • Valence shells in the atom

Question 9

Which characteristic of water protects fish when a lake freezes?

  • All these characteristics
  • water as a solvent
  • Water is less dense as a solid
  • cohesion

Question 10

Which of the following molecules is hydrophilic?

  • table salt
  • butter
  • olive oil

Question 11

Which of the following statements is true concerning hydrogen bonding and the liquid and solid states of water?

  • Only solid water forms hydrogen bonds.
  • Both liquid and solid states of water form hydrogen bonds.
  • Only liquid water forms hydrogen bonds.

Question 12

You test soda (pH 2.5) with blue litmus paper. What color would you expect to see?

  • Red
  • Green
  • Blue
  • Yellow

Question 13

You test bleach (pH 13) with red litmus paper. What color would you expect to see?

  • Blue
  • Red
  • Green
  • Yellow

Question 14

pH is a measure of

  • hydrogen ions
  • toxicity
  • chemical reactivity
  • electrical charge

Question 15

You have a solution that has a pH of 5 and need it to be pH 8. What do you do?

  • Add a base
  • Add an acid
  • Add a base

Question 1

Beryllium, Be, has an atomic number of 4 and an atomic mass of approximately 9. How many protons does a beryllium atom have?

  •  4
  •  5
  •  13
  •  9

Question 2

An element has 43 protons and 50 neutrons. What is the ATOMIC MASS of this element?

  •  43
  •  93
  •  50

Question 3

An atom is converted into an ion by adding or removing ___________________.

  •  neutrons
  •  protons
  •  electrons

Question 4

Neon has an atomic number of 10 and an atomic mass of approximately 20. How many electrons does neon have in its first shell?

  •  20
  •  2
  •  10
  •  8

Question 5

A shared pair of electrons is called a: _________.

  •  covalent bond
  •  hydrogen bond
  •  ionic bond
  •  polar bond

Question 6

Which bond is the weakest?

  •  Covalent bonds
  •  Hydrogen bonds
  •  Ionic bonds
  •  All 3 of these bonds are approximately the same strength.

Question 7

Will a polar covalent bond form between the two nitrogen atoms in nitrogen gas (N2)?

  •  No because hydrogen is needed to form polar covalent bonds.
  •  Yes, because nitrogen is not very electronegative.
  •  Yes, because nitrogen is very electronegative.
  •  No because both atoms are equally electronegative.

Question 8

A covalent chemical bond is one in which:

  •  Outer shell electrons of one atom are transferred to the inner electron shells of another atom.
  •  Protons or neutrons are shared by two atoms so as to satisfy the requirements of both.
  •  Outer shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both.
  •  Electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged

Question 9

Which characteristic of water protects fish when a lake freezes?

  •  cohesion
  •  All of these characteristics.
  •  water as a solvent
  •  water is less dense as a solid

Question 10

You are able to fill a glass with water so that the water goes above the rim of the glass. What property of water have you observed?

  •  density
  •  moderates temperature
  •  cohesiveness

Question 11

Which of the following molecules is hydrophilic?

  •  table salt
  •  olive oil
  •  butter

Question 12

You have a solution that has a pH of 8 and need it to be pH 5. What do you do?

  •  Add water
  •  Add an acid
  •  Add a base

Question 13

The pH of a solution is a measure of what in the solution?

  •  Concentration of hydrogen ions
  •  Total concentration of all ions in a solution
  •  Concentration of electrons
  •  Potential energy

Question 14

A substance with a pH of 4 is _______________?

  •  basic
  •  neutral
  •  acidic

Question 15

You test bleach (pH 13) with red litmus paper. What color would you expect to see?

  •  Red
  •  Blue
  •  Yellow
  •  Green

 

 

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