Chapter 4 Quiz Chem30A

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) Calcium sulfide is a compound in which both types of ions present have the same electron configuration, that of the noble gas argon. (2) The charge on the positive ions present in the compound Al2S3 is +3. (3) The polyatomic ions ammonium and cyanide do not contain oxygen.

All three statements are true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) An atom with the electron configuration 1s22s22p2 possesses two valence electrons. (2) The formula of the ionic compounds that contains Ba2+ and N3- ions is Ba2N3. (3) The polyatomic ions nitrate and azide are both tetraatomic entities.

None of the statements are true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) Ionic bonds result from the sharing of one or more pairs of electrons. (2) The compound copper(II) phosphate contains eight oxygen atoms per formula unit. (3) Ionic compounds that contain fixed charge metals cannot contain polyatomic ions.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The ions O2- and S2- are isoelectronic. (2) The symbol for an atom of X that has lost two electrons is X2-. (3) In all ionic compounds the total charge of the ions present per formula unit must add up to zero.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The most abundant ion in hard water is usually Na+. (2) Fresh water purified for drinking purposes contains no ions. (3) Tooth enamel contains both monatomic and polyatomic ions.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The number of valence electrons possessed by an atom can never exceed four. (2) Binary ionic compounds containing two nonmetals do not occur. (3) The name of the ionic compound Cu2S is copper(II) sulfide.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The octet rule is used to determine the number of valence electrons an atom possesses. (2) The formula for the compound sodium carbonate contains parenthesis. (3) Group IIA and VIA elements form ions that carry two units of charge.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) If an atom loses one or more electrons, it becomes negatively charged because protons now outnumber electrons. (2) Nitrogen, a group VA element, possesses five valence electrons. (3) Polyatomic ions are generally not very stable and usually lose their identity during chemical reactions.

Only one of the statements is true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) All ionic compounds that contain metal ions have names that contain Roman numerals. (2) Ionic compounds tend to have high melting points and tend to be good conductors of electricity when in the molten state. (3) Three ions are present in one formula unit of a compound that contains Na+ and O2- ions.

Two of the three statements are true.

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) Representative elements in the same group of the periodic table have the same number of valence electrons. (2) Discrete molecules do not exist in ionic compounds. (3) A sulfate ion has one less oxygen than a sulfite ion.

Two of the three statements are true.

For the electron configuration 1s22s22p63s1, choose the appropriate number of valence electrons present from the response list. a) 1 valence electron b) 3 valence electrons c) 5 valence electrons d) 7 valence electrons

a) 1 valence electron

For which of the following elements is the listed number of valence electrons correct? a) Al - 3 valence electrons b) Cl - 5 valence electrons c) Si - 2 valence electrons d) more than one correct response e) no correct response

a) Al - 3 valence electrons

Choose a formula from the response list with +1 charged monoatomic ions present. a) K3N b) AlF3 c) CaSO4 d) (NH4)2S

a) K3N

In which of the following ionic compounds are ions with a +1 charge present? a) Li2Se b) Al2Te3 c) Mg2Si d) SrO

a) Li2Se

For the ion or element combinations of M2+ and X2-, choose the correct formula for the compound produced. a) MX b) M2X c) MX2 d) M2X3

a) MX

The correct formula for the ionic compound that might be formed between Na and As is a) Na3As b) NaAs3 c) Na2As3 d) Na3As2

a) Na3As

The correct name for the ionic compound Al2Se3 is a) aluminum selenide b) aluminum(III) selenide c) aluminum triselenide d) dialuminum triselenide

a) aluminum selenide

Choose the polyatomic ion that contains one hydrogen atom. a) hydroxide ion b) ammonium ion c) nitrate ion d) sulfate ion

a) hydroxide ion

Elements in groups IA and VIIA of the periodic table possess, respectively, how many valence electrons? a) 1 and 1 b) 1 and 7 c) 7 and 1 d) 8 and 8

b) 1 and 7

Choose a formula from the response list where a greater number of negative ions are present than positive ions. a) K3N b) AlF3 c) CaSO4 d) (NH4)2S

b) AlF3

Which of the following ionic compounds would have a name that contains the Roman numeral III? a) AlCl3 b) FeBr3 c) Cu3N d) more than one correct response e) no correct response

b) FeBr3

In which of the following pairs of ionic compounds do both members of the pair contain +1 ions? a) KCl and CaO b) Na3N and Li2S c) AlCl3 and MgF2 d) more than one correct response e) no correct response

b) Na3N and Li2S

Choose the polyatomic ion that contains the elements nitrogen and hydrogen. a) hydroxide ion b) ammonium ion c) nitrate ion d) sulfate ion

b) ammonium ion

The correct name for the ionic compound Fe2Se3 is a) iron selenide b) iron(III) selenide c) iron triselenide d) diiron triselenide

b) iron(III) selenide

Formation of a positive ion is the result of an atom: a) losing one or more protons. b) losing one or more electrons. c) gaining one or more protons. d) gaining one or more electrons.

b) losing one or more electrons.

Which of the following pairings of compound name and compound formula is incorrect? a) sodium oxide - Na2O b) magnesium sulfide - MgS2 c) potassium chloride - KCl d) more than one correct response e) no correct response

b) magnesium sulfide - MgS2

Choose the appropriate number of atoms contained in a formula unit of calcium chloride. a) two atoms per formula unit b) three atoms per formula unit c) four atoms per formula unit d) five or more atoms per formula unit

b) three atoms per formula unit

Choose the appropriate number of atoms contained in a formula unit of copper(I) sulfide. a) two atoms per formula unit b) three atoms per formula unit c) four atoms per formula unit d) five or more atoms per formula unit

b) three atoms per formula unit

Choose the appropriate number of atoms contained in a formula unit of sodium oxide. a) two atoms per formula unit b) three atoms per formula unit c) four atoms per formula unit d) five or more atoms per formula unit

b) three atoms per formula unit

How many total electrons are present in a N3- ion? a) 4 b) 7 c) 10 d) 12

c) 10

For an element with the Lewis symbol , choose the appropriate number of valence electrons present from the response list. a) 1 valence electron b) 3 valence electrons c) 4 valence electrons d) 7 valence electrons

c) 4 valence electrons

For a group VA element, choose the appropriate number of valence electrons present from the response list. a) 1 valence electron b) 3 valence electrons c) 5 valence electrons d) 7 valence electrons

c) 5 valence electrons

For the electron configuration 1s22s22p63s23p64s23d104p3, choose the appropriate number of valence electrons present from the response list. a) 1 valence electron b) 3 valence electrons c) 5 valence electrons d) 7 valence electrons

c) 5 valence electrons

How many electrons appear in the Lewis symbol for an element whose electron configuration is 1s22s22p4? a) 2 b) 4 c) 6 d) 8

c) 6

Which of the following ions is not isoelectronic with the noble gas neon? a) Na+ b) F- c) C4+ d) N3-

c) C4+

Choose a formula from the response list where two ions are present per formula unit. a) K3N b) AlF3 c) CaSO4 d) (NH4)2S

c) CaSO4

Choose a formula from the response list with where the positive and negative ions present carry the same amount of charge. a) K3N b) AlF3 c) CaSO4 d) (NH4)2S

c) CaSO4

In which of the following pairings is the chemical formula not consistent with the ions shown? a) M2+, X3-, M3X2 b) M2+, X-, MX2 c) M+, X3-, MX3 d) more than one response e) no correct response

c) M+, X3-, MX3

Choose the correct formula of the compound formed when M, which has two valence electrons and X, which has seven valence electrons are combined. a) MX b) M2X c) MX2 d) M2X3

c) MX2

For the ion or element combinations of M2+ and X-, choose the correct formula for the compound produced. a) MX b) M2X c) MX2 d) M2X3

c) MX2

Which of the following statements about polyatomic ions is correct? a) All have names which end in -ate. b) All must contain one of the halogens. c) Negative ions are more common than positive ions. d) All carry a charge of two

c) Negative ions are more common than positive ions.

The correct formula for the ionic compound containing Tl3+ and Te2- ions would be a) TlTe b) Tl3Te2 c) Tl2Te3 d) Tl2Te

c) Tl2Te3

The "octet rule" relates to the number eight because: a) only atoms with eight valence electrons undergo chemical reaction. b) ions with charges of +8 and -8 are very stable. c) atoms, during compound formation, frequently obtain eight valence electrons. d) all electron subshells can hold eight electrons.

c) atoms, during compound formation, frequently obtain eight valence electrons.

For representative elements, valence electrons are those electrons located a) closest to the nucleus. b) in the outermost subshell. c) in the outermost shell. d) in s orbitals.

c) in the outermost shell.

Which of the following elements would be expected to form a monoatomic ion with a charge of +2? a) oxygen b) sulfur c) magnesium d) more than one response e) no correct response

c) magnesium

Which of the following pairings of compound name and compound formula is incorrect? a) sodium acetate - NaC2H3O2 b) barium sulfate - BaSO4 c) magnesium nitrate - MgNO3 d) more than one correct response e) no correct response

c) magnesium nitrate - MgNO3

Choose the polyatomic ion that contains a total of four atoms. a) hydroxide ion b) ammonium ion c) nitrate ion d) sulfate ion

c) nitrate ion

Choose the polyatomic ion that contains three oxygen atoms. a) hydroxide ion b) ammonium ion c) nitrate ion d) sulfate ion

c) nitrate ion

Which one of the following compounds has a formula that contains parentheses? a) barium carbonate b) lithium hydroxide c) strontium hydroxide d) ammonium hydroxide

c) strontium hydroxide

Choose a formula from the response list with -2 charged monoatomic ions present. a) K3N b) AlF3 c) CaSO4 d) (NH4)2S

d) (NH4)2S

Elements in groups IIA and VIIA of the periodic table would, respectively, be expected to form ions with charges of a) +2 and +7 b) -2 and -7 c) +2 and +1 d) +2 and -1

d) +2 and -1

For the electron configuration 1s22s22p63s23p5, choose the appropriate number of valence electrons present from the response list. a) 1 valence electron b) 3 valence electrons c) 5 valence electrons d) 7 valence electrons

d) 7 valence electrons

Which of the following statements is an accurate description of the structure of the ionic compound LiBr? a) Alternating layers of Li and Br atoms are present. b) Clusters of Li+ ions are balanced out by clusters of Br- ions. c) Individual molecules containing a Li+ ion and a Br- ion are present. d) Each cation present is surrounded by six anions in an extended array.

d) Each cation present is surrounded by six anions in an extended array.

In which of the following pairs of compounds are both members of the pair ionic compounds? a) PI3 and HBr b) H2S and NCl3 c) LiF and H2O d) LiI and NiO

d) LiI and NiO

Choose the correct formula of the compound formed when M, which is a group IIIA element and X, which is a group VIA element are combined. a) MX b) M2X c) MX2 d) M2X3

d) M2X3

For the ion or element combinations of M3+ and X2-, choose the correct formula for the compound produced. a) MX b) M2X c) MX2 d) M2X3

d) M2X3

The formulas of the sulfate ion, the nitrate ion, and the phosphate ion are, respectively, a) SO32-, NO32-, PO32- b) SO42-, NO42-, PO42- c) SO42-, NO3-, PO42- d) SO42-, NO3-, PO43-

d) SO42-, NO3-, PO43-

Choose the appropriate number of atoms contained in a formula unit of aluminum phosphate. a) two atoms per formula unit b) three atoms per formula unit c) four atoms per formula unit d) five or more atoms per formula unit

d) five or more atoms per formula unit

Choose the appropriate number of atoms contained in a formula unit of iron(II) hydroxide. a) two atoms per formula unit b) three atoms per formula unit c) four atoms per formula unit d) five or more atoms per formula unit

d) five or more atoms per formula unit

The Roman numeral III in the name iron(III) oxide indicates that: a) there are three times as many iron atoms present as oxygen atoms. b) there are three iron atoms per formula unit. c) there are three oxygen atoms per formula unit. d) iron is present in the form of +3 ions.

d) iron is present in the form of +3 ions.

In the formation of which of the following ionic compounds is the number of electrons transferred per formula unit equal to three? a) AlN b) 1K3N c) BaCl2 d) more than one correct response e) no correct response

d) more than one correct response

In which of the following compounds is there a one-to-two ratio between positive and negative ions? a) calcium sulfide b) magnesium bromide c) lead(IV) oxide d) more than one correct response e) no correct response

d) more than one correct response

Which of the following compounds contain more than 10 atoms per formula unit? a) ammonium phosphate b) aluminum carbonate c) iron(III) cyanide d) more than one correct response e) no correct response

d) more than one correct response

Which of the following elements would have a Lewis symbol that contains five electrons? a) nitrogen b) fluorine c) phosphorus d) more than one correct response e) no correct response

d) more than one correct response

In which of the following pairs of ions are the two members of the pair isoelectronic? a) S2- and Cl- b) Na+ and K+ c) Al3+ and N3- d) more than one respnose e) no correct response

d) more than one response

Which of the following compounds contains four atoms per formula unit? a) chromium(III) nitride b) tin(II) iodide c) magnesium fluoride d) ruthenium(III) chloride

d) ruthenium(III) chloride

Choose the polyatomic ion that has a negative two charge. a) hydroxide ion b) ammonium ion c) nitrate ion d) sulfate ion

d) sulfate ion

Which of the following is an incorrect statement about the number of electrons lost or gained by a representative element during ion formation? a) The number is usually three or less. b) The number is governed by the octet rule. c) The number is related to the position of the element in the periodic table. d) More than one correct response. e) no correct response

e) No correct response.

In which of the following pairs of polyatomic ions do both members of the pair have the same charge? a) sulfate and phosphate b) carbonate and hydroxide c) ammonium and nitrate d) more than one correct response e) no correct response

e) no correct response

The mechanism for ionic bond formation always involves the transferring of: a) electrons from nonmetallic atoms to metallic atoms. b) protons from the nucleus of metallic atoms to the nucleus of nonmetallic atoms. c) sufficient electrons to produce ions of equal but opposite charge. d) more than one correct response. e) no correct response.

e) no correct response.