Chem. chap. 5

Which of the following are true? (1) Sulfur in dihydrogen monosulfide, H2S, has two bonds and one lone pair of electrons. (2) Silicon in silicon dioxide, SiO2, has two double bonds and zero lone pairs of electrons. (3) The sulfur atom in sulfur dioxide, SO2, has one lone pair of electrons. (4) Carbon dioxide, CO2, has a total of two lone pairs of electrons (5) There are no lone pairs in ethane, C2H6, . A. 2,3,5 B. 1,3,5 C. 2,3,4 D. 1,4,5

A. 2,3,5

Which of the following have the same number of valence electrons? Oxygen, chlorine, calcium, and barium A. Ca and Ba B. O and Cl C. O and Ca D. Cl and Ba

A. Ca and Ba

Which of the following is considered an elemental substance? A. I2 (iodine) B. H20 (water)

A. I2 (iodine)

Sodium acetate's formula is . Acetate, CH3COO1- can also be written as C2H3O2 1-. A. NaC2H2O2 B. NaC2H2O2 C. NaC2H4O D. NaCH2O2

A. NaC2H3O2

Hydrogen cyanide may also be called hydrocyanic acid when in aqueous solution. A. True B. False

A. True

The compound CS2 is called carbon disulfide. A. True B. False

A. True

Which of the following formulas includes a parenthesis? A. aluminum nitrate B. magnesium hydrogen phosphate C. magnesium carbonate D. sodium bromide

A. aluminum nitrate

Which of the following compounds contains oxygen? A. calcium peroxide B. ammonium sulfide C. potassium cyanide D. iron (II) chloride

A. calcium peroxide

Which of the following anions has its number of oxygen atoms equal to 3 and a net charge of -2? A. carbonate B. peroxide C. nitrate D. bicarbonate

A. carbonate

The compound H2CO3(aq) is called A. carbonic acid B. bicarbonic acid C. carbonous acid D. carbonim acid

A. carbonic acid

What is the chemical name given to the compound whose formula is N2O4? A. dinitrogen tetraoxide B. nitrogen quadaoxide C. nitrogen (II) oxygen (IV) D. nitrogen (IV) oxide

A. dinitrogen tetraoxide

Which of the following is the most electronegative element on the periodic table? A. fluorine B. sodium C. oxygen D. carbon

A. fluorine

Which of the following does not have a charge of -1? A. hydrogen phosphate B. bicarbonate C. nitrite D. bisulfate

A. hydrogen phosphate

When a compound is composed of a metal and a non-metal it is called A. ionic B. covalent C. coordinate D. either B or C

A. ionic

When the valence electrons between atoms are transferred the bond is called A. ionic B. polar covalent C. nonpolar covalent

A. ionic

Which of the following statements are true? (1) Compounds formed from carbon and hydrogen should be ionic in character. (2) Metals are generally more electronegative than non-metals. (3) The electrons in a carbon-chlorine covalent bond are "shared" exactly equally between these two atoms. A. none of these are true B. only 1 C. only 3 D. only 2

A. none of these are true

Which of the following exists as a diatomic molecule? A. oxygen B. phosphorus C. silicon D. neon

A. oxygen

Which of the following polyatomic ions is the most negatively charged? A. phosphate B. acetate C. dihydrogen phosphate D. carbonate

A. phosphate

Which of the following formulas does not include a parenthesis? A. sodium dichromate B. aluminum bicarbonate C. iron (II) hydroxide D. magnesium dihydrogen phosphate

A. sodium dichromate

Which anion does not have its number of oxygen atoms equal to 2 and its net charge equal to -1? A. sulfite B. chlorite C. bromite D. nitrite

A. sulfite

The central atom in sulfuric acid, H2SO4, is A. sulfur B. oxygen C. hydrogen D. none of these

A. sulfur

The compound H2SO3(aq) is called A. sulfurous acid B. hydrogen sulfide C. sulfuric acid D. sulfite acid

A. sulfurous acid

A covalent compound is composed of A. two or more non-metals B. a metal and a non-metal C. two or more metals D. either A or C

A. two or more non-metals

What is the chemical formula of a compound named ammonium sulfide? A. (NH4)2S3 B. (NH4)2S C. (NH4)S2 D. NH4S

B. (NH4)2S

Which of the following are true? (1) Another name for the hydrogen sulfate anion is bisulfate. (2) There are twice as many hydrogen as oxygen atoms in the acetate anion. A. 2 B. 1 C. both 1 and 2 D.. neither are true

B. 1

Which of the following statements are true? (1) Covalent bonds are formed between atoms that share pairs of electrons. (2) Energy is released as two atoms, such as two hydrogen atoms, form a bond. (3) When covalent bonds are broken energy is released. (4) Water, H2O and hydrogen peroxide, H2O2, have identical properties. A. 1,3,4 B. 1,2 C. 1,2,3,4 D. 1,2,3 E. 3,4

B. 1,2

Water has how many covalent bonds and how many lone pairs A. 2;0 B. 2;2 C. 2;6 D. 2;4

B. 2;2

The phosphate anion, PO4 3- has how many valence electrons A. 24 B. 32 C. 22 D. 26

B. 32

Nitrogen trifluoride, NF3, has how many bonds, how many single bonds, and how many lone pairs of electrons A. 8;3;10 B. 3;3;10 C. 5;1;9 D. 7;2;9

B. 3;3;10

Match the element with the correct number of valence electrons A. N...3 B. Al...3 C. Mg...1 D. He....8

B. Al....3

The chemical compound whose formula is Na2S has the chemical name sodium sulfate. A. True B. False

B. False

Which of the following sets is comprised exclusively of covalent compounds? A. CoCl2, CaCO3, AlPO4 B. H2O, SO2, NO C. Co(H2PO4)2, KCl, PCl3 D. KI, Al2O3, Li2S

B. H2O, SO2, NO`

Potassium dihydrogen phospate has the formula A. K2H2PO4 B. KH2PO4 C. K(H2PO4)2 D. K2HPO4

B. KH2PO4

What is the chemical formula of the compound named potassium bicarbonate? A. K3HCO3 B. KHCO3 C. K(HCO3)2 D. K2(HCO3)

B. KHCO3

What is the most likely formula of the neutral, ionic compound formed by lithium and nitrogen? A. LiN B. Li3N C. Li2N D.LiN2

B. Li3N

Which of the following would you expect to be ionic? A. C-S B. Na-F C. F-F D. N-O

B. Na-F

Which of the following is diphosphorus pentaoxide? A. P4O10 B. P2O5 C. P2O3

B. P2O5

Which of the following have the same number of valence electrons? A. all elements in period 4 B. all elements in group 15

B. all elements in group 15

Which anion has a -4 charge? A. nitride B. carbide C. dichromate D. permangante

B. carbide

Which of the following gases does not have a triple bond? A. hydrogen cyanide, HCN B. carbon dioxide, CO2 C. acetylene, C2H2 D. nitrogen gas, N2

B. carbon dioxide, CO2

Which anion does not have a -3 charge? A. phosphate B. chlorate C. nitride D. phosphide

B. chlorate

Which of the following ions contains oxygen A. cyanide B. chlorite C. iodide D. fluoride

B. chlorite

CuClO may be called A. copper (II) chlorate B. copper (I) hypochlorite C. copper (I) chlorate D. copper (I) chlorite

B. copper (I) hypochlorite

Which of the following does not have at least one multiple covalent bond? A. hydrogen cyanide, HCN B. ethane, C2H6 C. carbon dioxide, CO2 D. ethene, C2H4

B. ethane, C2H6

Consider a bond A-B. If the difference in electronegativity is 3.5, the bond is A. nonpolar covalent B. ionic C. polar covalent

B. ionic

Which of the following elements does not have at least two differently charged cations? A. cobalt B. magnesium C. copper D. iron`

B. magnesium

What is the chemical name of the compound whose formula is MgSO4? A. magnesium sulfur tetraoxide B. magnesium sulfate C. There is no such compound. D. magnesium sulfide

B. magnesium sulfate

Which of the following anions has its number of oxygen atoms equal to a number other than 4? A. hydrogen phosphate B. nitrate C. permanganate D. perchlorate

B. nitrate

Consider a bond A-B. If the difference in electronegativity is 0.0, the bond is A. polar covalent B. nonpolar covalent C. ionic

B. non polar covalent

If the electrons are shared equally between the two atoms, the bond is called A. polar covalent B. non polar covalent C. ionic

B. non polar covalent

Which of the following phrases best describes the H-O bonds present in water (H20) A. nonpolar and ionic B. polar and covalent C. polar and ionic D. nonpolar and covalent

B. polar and covalent

How many resonance structures could be drawn for ozone, O3 A. 0 B. 2 C. 3 D. 1

B.2

What is the number of single bonds in C2H6O? A. 7 B. 8 C. 5 D. 6

B.8

Which of the following are true? (1) The perchlorate, phosphate, and sulfate anions have the same number of oxygen atoms. (2) The H- ion is called hydride. (3) The HCO3- ion is called bicarbonate. A. just 1 and 3 B. just 2 and 3 C. 1,2,3 D. just 1 and 2

C. 1,2,3

How many resonance structures could be drawn for SO2 A. 0 B. 3 C. 2 D. 1

C. 2

How many valence electrons are needed to construct the Lewis dot structure of the BCl3 molecule? A. 21 B. 11 C. 24 D. 32

C. 24

The number of valence electrons in the carbonate anion , CO3 2- is A. 20 B. 22 C. 24 D. 26

C. 24

How many valence electrons are required when constructing a complete Lewis dot structure of the compound CF2I2? A. 66 B. 58 C. 32 D. 29

C. 32

The nitrogen in ammonia, NH3, and the phosphorus in phosphine, PH3, both have how many bonds and how many lone pairs of electrons A. 3;0 B. 4;0 C. 3;1 D. 4;1

C. 3;1

Methane, CH4, has how many covalent bonds and how many lone pairs A. 4;1 B. 2;4 C. 4;0 D. 4;2

C. 4;0

Which of the following covalent bonds would you expect to be the most polar? A. C-Cl B. C-C C. C-F D. C-H

C. C-F

What is the chemical formula of calcium phosphate? A. Ca2PO4 B. Ca3PO4 C. Ca3(PO4)2 D. CaPO4

C. Ca3(PO4)2

The expected compound between calcium and bromine is A. Ca2Br2 B. CaBr C. CaBr2 D. Ca2Br

C. CaBr2

The expected formula between magnesium and sulfur is A. MgS2 B. Mg2S3 C. MgS D. Mg2S

C. MgS

The expected formula between sodium and oxygen is A. NaO2 B. Na2O3 C. Na2O D. NaO

C. Na2O

The formula for rhenium (VIII) oxide is A. Re3O6 B. ReO7 C. ReO4 D. Re2O7

C. ReO4

Which of the following polyatomic ions is positively charged? A. acetate B. carbonate C. ammonium D. dihydrogen phosphate

C. ammonium

Which of the following statements are true? (1) In its ground state, sulfur has two valence electrons and always needs six more to reach the octet. (2) In its ground state, carbon has four valence electrons and always needs four more to reach the octet. A. only 1 B. both 1 and 2 C. only 2

C. only 2

What is the chemical name given to the compound whose formula is PCl3? A. phosphorous chloride B. monophosphorous trichloride C. phosphorous trichloride D. phosphide trichloride

C. phosphorous trichloride

Consider a bond A-B. If the difference in electronegativity is 1.0, the bond is A. non polar covalent B. ionic C. polar covalent

C. polar covalent

When electrons in a bond are shared unequally the bond is A. non polar covalent B. ionic C. polar covalent

C. polar covalent

Which of the following is the least electronegative? A. chlorine B. hydrogen C. sodium D. sulfur

C. sodium

Which of the following substances is molecular (composed of individual molecules) in composition? A. helium, as found in a balloon B. carbon, as coal C. water, as a glass of water D. copper, as an ingot

C. water, as a glass of water

Match the element with the correct number of valence electrons A. Si... 5 B. I.... 1 C. S... 6 D. Ne...2

C.S...6

The number of valence electrons in the nitrate anion, NO3 1- is A. 22 B. 26 C. 32 D. 24

D. 24

Nitrogen trifluoride, NF3, has how many valence electrons A. 22 B. 32 C. 24 D. 26

D. 26

How many resonance structures could be drawn for the nitrate ion NO3 1- A. 1 B. 0 C. 2 D. 3

D. 3

Carbon tetrafluoride, CF4, has how many total valence electrons A. 36 B. 26 C. 24 D. 32

D. 32

Hydrazine, N2H4, has how many covalent bonds and how many lone pairs A. 4;2 B. 2;2 C. 3;4 D. 5;2

D. 5;2

The expected formula between aluminum and oxygen is A. AlO B. AlO2 C. Al2O D. Al2O3

D. Al2O3

Which is not a covalent compound? A. H2O B. CO C. CO2 D.. CaF2

D. CaF2

Which of the following compounds has a covalent bond? A. NaCl B. KBr C. LiH D. H2

D. H2

Which of the following AQUEOUS acids does not have the -ous ending? A. H2SO3 (aq) B. HNO2 (aq) C. HClO2 (aq) D. H2CO3 (aq)

D. H2CO3 (aq)

Which of the following AQUEOUS acids does not have the -ic ending? A. HF (aq) B. H2SO4 (aq) C. HCN (aq) D. H2SO3 (aq)

D. H2SO3 (aq)

Hydrocyanic acid's formula is A. H2CN(aq) B. H2CNO(aq) C. HCNO(aq) D. HCN(aq)

D. HCN(aq)

The formula Ca3N2 may be called A. calcium nitrate B. dicalcium trinitride C. calcium nitrite D. calcium nitride

D. calcium nitride

Which of the following has more than one double bond? A. carbon monoxide, CO B. oxygen gas, O2 C. nitrogen gas, N2 D. carbon dioxide, CO2

D. carbon dioxide, CO2

Which is the only ion that has a -2 charge? A. chlorate B. phosphate C. ammonium D. chromate

D. chromate

Which of the following elements has at least two differently charged cations? A. magnesium B. calcium C. lithium D. cobalt

D. cobalt

Which of the following anions has the largest number of oxygen atoms per formula unit? A. carbonate B. dichromate C. hydrogen phosphate D. perchlorate

D. dichromate

The compound HClO(aq) is called A. hydrochloric acid B. perchloric acid C. hyperchloric acid D. hypochorous acid

D. hypochlorous acid

What is the chemical name of the compound whose formula is K2O? A. potasside oxygen B. dipotassium oxygen C. potassium oxygen D. potassium oxide

D. potassium oxide

The number of valence electrons in the ammonium ion, NH4 1+ is 10

False

A single bond is always represented by two electrons.

True

The nitrogen molecule, N2, has 10 total valence electrons.

True

True or False: A chemical compound formed from lithium and chlorine should be ionic.

True

Covalent bond between two atoms

a stable arrangement of atoms made by sharing two electrons between atoms

Ionic bond

a strong lattice of positively and negatively charged atoms held together by electrical forces

Electronegativity

the numerical rating of an atom's ability to attract the shared electrons