week 2 Flashcards
0
Q
2) Elements that have atoms with full outer shells of electrons A) will form many compounds. B) will normally form anions. C) will normally form cations. D) frequently form hydrogen bonds. E) are inert.
A
2) Elements that have atoms with full outer shells of electrons A) B) C) D) E) are inert. *
1
Q
1) The chemical behavior of an atom is determined by
A) the number of protons.
B) the number of neutrons.
C) the number and arrangement of electrons.
D) the size of the atom.
E) the mass of the atom.
A
1) The chemical behavior of an atom is determined by
A)
B)
C) the number and arrangement of electrons. *
D)
E)
2
Q
3) When atoms complete their outer electron shell by sharing electrons, they form A) ionic bonds. B) covalent bonds. C) hydrogen bonds. D) anions. E) cations.
A
3) When atoms complete their outer electron shell by sharing electrons, they form A) B) covalent bonds. * C) D) E)
3
Q
4) In a molecule of nitrogen, three pairs of electrons are shared by two nitrogen atoms. The type of bond that is formed would be an example of a(n) A) single covalent bond. B) double covalent bond. C) triple covalent bond. D) polar covalent bond. E) hydrogen bond.
A
4) In a molecule of nitrogen, three pairs of electrons are shared by two nitrogen atoms. The type of bond that is formed would be an example of a(n) A) B) C) triple covalent bond. * D). E)
4
Q
5) If a pair of electrons is unequally shared between two atoms, a(n) \_\_\_\_\_ occurs. A) single covalent bond B) double covalent bond C) triple covalent bond D) polar covalent bond E) hydrogen bond
A
5) If a pair of electrons is unequally shared between two atoms, a(n) \_\_\_\_\_ occurs. A) B) C) D) polar covalent bond * E)
5
Q
6) Ions with a positive charge are called A) cations. B) anions. C) radicals. D) polyatomic ions. E) isotopes.
A
6) Ions with a positive charge are called A) cations. * B) . C) . D) E)
6
Q
7) Ionic bonds are formed when
A) atoms share electrons.
B) electrons are completely transferred from one atom to another.
C) a pair of electrons is shared unequally by two atoms.
D) hydrogen forms bonds with negatively charged atoms in the same or different molecule.
E) two or more atoms lose electrons at the same time.
A
7) Ionic bonds are formed when A) . B) electrons are completely transferred from one atom to another. * C) D) E)
7
Q
8) In living cells, the weakest bond between two or more atoms is the _____ bond.
A) ionic B) covalent C) polar D) nonpolar E) hydrogen
A
8) In living cells, the weakest bond between two or more atoms is the _____ bond.
A) B) C) D) E) hydrogen *
8
Q
9) Which one of the following statements is not correct about the reaction H2 + Cl2 → 2 HCl?
A) H2 and Cl2 are the reactants.
B) HCl is the product.
C) One molecule of hydrogen contains 2 atoms.
D) Two molecules of HCl are formed in the reaction.
E) This reaction is an example of a decomposition reaction.
A
9) Which one of the following statements is not correct about the reaction H2 + Cl2 → 2 HCl?
A) B) C) D) E) This reaction is an example of a decomposition reaction. *
9
Q
9) Which one of the following statements is not correct about the reaction H2 + Cl2 → 2 HCl?
A) H2 and Cl2 are the reactants.
B) HCl is the product.
C) One molecule of hydrogen contains 2 atoms.
D) Two molecules of HCl are formed in the reaction.
E) This reaction is an example of a decomposition reaction.
A
9) Which one of the following statements is not correct about the reaction H2 + Cl2 → 2 HCl?
A) B) C) D) E) This reaction is an example of a decomposition reaction. *
10
Q
10) AB → A + B is to decomposition as A + B → AB is to A) exchange. B) synthesis. C) combustion. D) replacement. E) metabolism.
A
10) AB → A + B is to decomposition as A + B → AB is to A) . B) synthesis. * C) . D) . E)
11
Q
11) Inorganic compounds that are soluble and whose ions will conduct an electrical current are called
A) hydrophobic. B) electrolytes. C) covalent bonds. D) polar covalent molecules. E) hydration spheres.
A
11) Inorganic compounds that are soluble and whose ions will conduct an electrical current are called
A) . B) electrolytes. * C) D) E)
12
Q
12) The bond between sodium and chloride in the compound sodium chloride (NaCl) is
A) an ionic bond. B) a single covalent bond. C) a nonpolar covalent bond. D) a double covalent bond. E) a double ionic bond.
A
12) The bond between sodium and chloride in the compound sodium chloride (NaCl) is
A) an ionic bond. * B) . C) . D) . E)
13
Q
13) Identify cations from the following: A) Na+ B) Cl- C) K+ D) A and B E) A and C
A
13) Identify cations from the following: A) B) C) D) E) A and C *
14
Q
14) An anion would best be represented by which of the following? A) Na+ B) Cl- C) K+ D) A and B E) A and C
A
14) An anion would best be represented by which of the following? A) B) Cl- * C) D) E)
15
Q
15) From the following group, indicate one containing only trace elements.
A) sulphur, chlorine, oxygen B) selenium, hydrogen, calcium C) boron, oxygen, carbon D) silicon, fluorine, tin E) cobalt, calcium, sodium
A
15) From the following group, indicate one containing only trace elements.
A) B) C) D) silicon, fluorine, tin * E)
16
Q
16) A needle floating on the surface of a glass of water best illustrates A) surface tension. B) chemical tension. C) subatomic particles. D) cation action. E) anion action.
A
16) A needle floating on the surface of a glass of water best illustrates A) surface tension. * B) . C) . D) E) .
17
Q
17) An example of an organic substance is A) table sugar. B) sodium. C) table salt. D) oxygen. E) nitric oxide (NO).
A
17) An example of an organic substance is A) table sugar. * B) . C) D) E)
18
Q
18) An example of an inorganic substance is A) fructose. B) water. C) lipid. D) glycogen. E) cholesterol.
A
18) An example of an inorganic substance is A) . B) water. * C) . D) . E)
19
Q
19) What element is the most plentiful in the human body? A) sulfur B) sodium C) oxygen D) potassium E) carbon
A
19) What element is the most plentiful in the human body? A) B) C) oxygen * D) E)
20
Q
20) What element is the second most abundant in the human body? A) oxygen B) carbon C) hydrogen D) nitrogen E) calcium
A
20) What element is the second most abundant in the human body? A) B) carbon * C) D) E)
21
Q
22) The molecule H2 is known as A) hydro. B) hydrogen. C) hydroxide. D) helium. E) helios.
A
22) The molecule H2 is known as A) . B) hydrogen. * C) . D) . E)
22
Q
23) The molecule O2 is known as A) oxide. B) oxygen. C) organic. D) B and C E) none of the above
A
23) The molecule O2 is known as A) . B) oxygen. * C) . D) E)
23
Q
24) The basic units of matter include \_\_\_\_\_ or \_\_\_\_\_. A) atoms; elements B) protons; neutrons C) protons; electrons D) neutrons; electrons E) cells; tissues
A
24) The basic units of matter include \_\_\_\_\_ or \_\_\_\_\_. A) atoms; elements * B) C) D) E)
24
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25) H2O is an example of a(n)
A) ionic formula.
B) glucose molecule.
C) molecular formula.
D) sodium molecule.
E) covalent formula.
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25) H2O is an example of a(n)
A) .
B) .
C) molecular formula. *
D) .
E)
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25
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26) A nanometer is
A) 10-6 meter.
B) 10-8 meter.
C) 10-9 meter.
D) 10-10 meter.
E) 10-12 meter.
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26) A nanometer is
A)
B)
C) 10-9 meter. *
D)
E)
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26
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27) When electrons are transferred from one atom to another, and the two atoms unite as a result of the electrostatic attraction,
A) an ion is formed.
B) a molecule is formed.
C) a hydrogen bond is formed.
D) an ionic bond is formed.
E) a covalent bond is formed.
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27) When electrons are transferred from one atom to another, and the two atoms unite as a result of the electrostatic attraction,
A)
B)
C)
D) an ionic bond is formed. *
E)
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27
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28) Calcium atoms have two electrons in the outermost shell. As a result, you would expect calcium to form ions with a charge of
A) +1.
B) +2.
C) -1.
D) -2.
E) 0.
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28) Calcium atoms have two electrons in the outermost shell. As a result, you would expect calcium to form ions with a charge of
A)
B) +2. *
C)
D)
E)
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28
29) Magnesium atoms have two electrons in the outermost shell and chlorine atoms have seven. The compound magnesium chloride would contain
A) 1 magnesium and 1 chlorine.
B) 1 magnesium and 2 chlorine.
C) 2 magnesium and 1 chlorine.
D) 2 magnesium and 7 chlorine.
E) impossible to tell without more information
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29) Magnesium atoms have two electrons in the outermost shell and chlorine atoms have seven. The compound magnesium chloride would contain
A)
B) 1 magnesium and 2 chlorine. *
C)
D)
E)
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29
30) Each of the following statements concerning hydrogen bonds is true, except one. Identify the exception.
A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms.
B) Hydrogen bonds can occur within a single molecule.
C) Hydrogen bonds can form between neighboring molecules.
D) Hydrogen bonds are important forces for holding large molecules together.
E) Hydrogen bonds are responsible for many of the unique properties of water.
30) Each of the following statements concerning hydrogen bonds is true, except one. Identify the exception.
```
A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms. *
B) .
C) .
D)
E) .
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30
31) A(n) _____ is a substance that consists entirely of atoms with the same atomic number.
31) A(n) _____ is a substance that consists entirely of atoms with the same atomic number.
Answer: element
31
32) The centre of an atom is called the _____.
32) The centre of an atom is called the _____.
| Answer: nucleus
32
33) Electrons whirl around the center of the atom at high speed forming a(n) _____.
33) Electrons whirl around the center of the atom at high speed forming a(n) _____.
Answer: electron cloud
33
34) Electrons in an atom occupy an orderly series of electron shells or _____.
34) Electrons in an atom occupy an orderly series of electron shells or _____.
Answer: energy levels
34
35) A _____ is a combination of two or more atoms and has different physical and chemical properties than its individual atoms.
35) A _____ is a combination of two or more atoms and has different physical and chemical properties than its individual atoms.
Answer: compound
35
36) Ions with a positive charge are called _____.
36) Ions with a positive charge are called _____.
| Answer: cations
36
37) Ions with a negative charge are called _____.
37) Ions with a negative charge are called _____.
| Answer: anions
37
38) In a _____ chemical bonds between atoms are broken as atoms are rearranged in new combinations to form different chemical substances.
38) In a _____ chemical bonds between atoms are broken as atoms are rearranged in new combinations to form different chemical substances.
Answer: chemical reaction
38
39) A(n) _____ is a homogeneous mixture containing a solvent and a solute.
39) A(n) _____ is a homogeneous mixture containing a solvent and a solute.
Answer: solution
39
40) _____ are soluble inorganic compounds whose ions will conduct an electric current in solutions.
40) _____ are soluble inorganic compounds whose ions will conduct an electric current in solutions.
Answer: Electrolytes
40
41) Molecules that readily dissolve in water are called _____.
41) Molecules that readily dissolve in water are called _____.
Answer: hydrophilic
41
42) Molecules that do not dissolve in water are called _____.
42) Molecules that do not dissolve in water are called _____.
Answer: hydrophobic
