Chem. Chapter 5 Study Guide

the expected formula between calcium and oxygen is ____ a.CaO b. Ca205 c.Ca20 d.Ca02

Ca0

T or F sulfer tetrafluoride is the expected formula of the compound that forms between sulfer and fluorine

False

T or F Hydrogen may have a +1 an -1 charge

True

T or F in its ground state, carbon has four valence elctrons and always needs four more to reach octet

True

mehtane has____covalent bonds and ____ lone pairs a.4,0 b.4,1 c.4,2 d.2,4

a. 4,0

what is the chemical formula of calcium phosphate? a.Ca3(PO4)2 b.CaPO4 c.Ca2PO4 d.Ca3PO4

a. Ca3(PO4)2

what is the chemical formula of the compound named potassium bicarbonate? a.KHCO3 b.K(HCO3)2 c.K2(HCO3) d.K3HCO3

a. KHCO3

which of following elements has the highest number of valence electrons ? a. argon b.magnesium c.phosphorus d.lithium

a. argon

the compound H2CO3 is called____ a. carbonic acid b. carbonium acid c.bicarbonic acid d.carbonous acid

a. carbonic acid

which of the following -ous ending cations have the least positive charge? a. ferrous b.mercurous c.stannous d.cobaltous

a. ferrous

which of the following does not have a charge of -2? a.nitrate b.dichromate c.carbonate d.chromate

a. nitrate

which of following anions does not have its number of oxygen atom equal to 2 and a net charge of -1? a.nitrite b.sulfite c.peroxide d.chlorite

a. nitrite

which of the following has a triple bond? a. nitrogen b.water c.oxygen d.carbon dioxide

a. nitrogen

which of the following may be classified as an oxyanion? a. perchlorate b.chloride c.ammonium d.bromide

a. perchlorate

which of the following formulas does not include a parenthesis? a.sodium dichromate b.ammonium carbonate c.magnesium dihydrogen phosphate d.aluminum bicarbonate

a. sodium dichromate

which of the following is not a binary compound? a. sodium hypochlorite b.sodium chloride c.sodium sulfide d.sodium hydride

a. sodium hypochlorite

nitrogen trifluoride has ____lone pairs of electrons a.10 b.8 c.5 d.2

a.10

the number of valence electrons in the carbonate anion is___ a.24 b.20 c.22 d.26

a.24

to follow the octet rule, how many electrons must a neutral sulfur atom gain when forming a negative ion? a.2 b.1 c.8 d.6

a.7

the number of valence electrons in neon is_____ a.8 b.2 c.6 d.4

a.8

which of the following covalent bonds would you expect to be the most polar? a.C-C b.C-F c.C-H d.C-Cl

a.C-C

the expected formula between hydrogen and nitrogen is is _____ a.NH3 b.HN c.NH2 d.NH4

a.NH3

which of the following anions has its number of oxygen atoms equal to a number other than 3? a.dihydrogen phosphate b.chlorate c.carbonate d.nitrate

a.dihydrogen phosphate

which of the following has the same number of valance electrons ? a.oxygen b.boron c.arsenic d.nitrogen

a.oxygen

which of the following bonds would you expect to be ionic? a.F-F b.Na-F c.C-s d.N-O

b. Na-F

which of the following poly-atomic ions is positively charged? a.dihydrogen phosphate b.ammonium c.acetate d.carbonate

b. ammonium

what is the chemical name given to compound whose formula is N204? a.nitrogen(II) oxygen(IV) b. dinitrogen tetraoxide c.nitrogen(IV) oxide d.nitrogen quadraoxide

b. dinitrogen tetraoxide

which of the following phrases best describes the H-O bonds present in water (H20)? a.nonpolar and covalent b.polar and covalent c.polar and ionic d.nonpolar and ionic

b. polar and covalent

which of the following -ic ending cations has the least positive charge? a.ferric b.stannic c.cobaltic d.mercuric

b. stannic

Which of the following substances is molecular ( composed of individual molecules) in composition? a.copper, and an ingot b.water, as a glass of water c.carbon, as coal d.helium, as found in a ballon

b. water, as a glass of water

the number of valence electrons in nitrate anion is ____ a.30 b.24 c.28 d.23

b.24

nitrogen trifluoride has ____ valence electrons a.20 b.26 c.24 d.22

b.26

how many covalent bonds can an element group VA form with other elements? a.4 b.3 c.1 d.2

b.3

phosphine, PH3 has_____covalent pairs and _____ lone pairs a.3,2 b.3,1 c.2,0 d.3,0

b.3,1

which of the following sets is comprised exclusively of ionic binary compounds? a.Co(H2PO4)2,KCl,PCl3 b.KI,Al203,Li2S C.H20,Si02,NO d.CoCl2,CaCO3,AlPO4

b.KI,Al203,Li2S

what is the most likely formula of the neutral, ionic compound formed by magnesium and oxygen? a.Mg02 b.Mg0 c.Mg20 d.Mg302

b.Mg0

which anion has a -4 charge? a. permanganate b.carbide c.dichromate d.nitide

b.carbide

which of the following anions has the largest number of oxygen atoms per formula unit? a. carbonate b.dichromate c.perchlorate d.hygrogen phosphate

b.dichromate

the H- ion is called a. hydrogen b.hydride c.hydroxide d.hydranion

b.hydride

which of the following elements has the least number of valence electrons ? a. magnesium b.lithium c.phosphorus d.argon

b.lithium

how many valence electrons are needed to construct the Lewis dot structure of the BCl3 molecule? a.32 b.24 c.11 d.21

b24

the number of valence electrons in aluminum is____ a.2 b.5 c.3 d.7

c. 3

Which of the following compounds has a covalent bond? a.Kbr b.NaCl c.H2 d.LiH

c. H2

Acetylene, C2H2, has _____ a.one triple bond b. two double bonds c.two single bonds d. both a and c

c. both a and c

the formula Ca3N2 may be called______ a. dicalcium trinitride b.calcium nitrate c.calcium nitride d.calcium nitrate

c. calcium nitride

which of the following has more than one double bond? a.oxygen b.carbon monoxide c.carbon dioxide d.nitrogen

c. carbon dioxide

which of following anions has its number of oxygen atoms equal to 2 and a net charge of -1? a. bicarbonate b.nitrate c.chlorite d.permangnate

c. chlorite

consider a bond A-B. If the difference in electronegativity is 3.5, the bond is considered ____ a.hydrogen b.ionic c.polar covalent d.covalent

c. polar covalent

How many valence electrons does a single, neutral iodine atom have? a.5 b.4 c.7 d.3

c.7

which of the following AQUEOUS acids does not have the ic ending? a.HCN(aq) b.HF(aq) c.H2SO3(aq) d.H2SO4(aq)

c.H2SO3(aq)

the expected formula between silicon and fluorine is ____ a. SiF b.SiF6 c.SiF4 d.SiF2

c.SiF4

which is the only ion that has a -2 charge? a.phosphate b.ammonium c.chromate d.chlorate

c.chromate

every single COVALENT bond represents_____electrons a. four b.one c.two d.one cannot say unless the atoms that make up the bond are known

c.two

what is the chemical formula of a compound named ammonium sulfide? a. (NH4)2S3 b.NH4S c.(NH4)S2 d.(NH4)2S

d. (NH4)2S

which of the following is considered an elemental substance? a.Fe(an iron nail) b. H20(water) c.I2(iodine) d.A and C are elemental substances e. all of the preceding are elemental substances

d. A and C are elemental substances

what is the chemical formula of rhenium (VII) oxide? a. Re07 b.Re306 c.Re04 d.Re207

d. Re207

which of the following polyatomic ions has the most atoms per formula unit? a. hydrogen phosphate b.carbonate c.ammonium d.acetate

d. acetate

A binary covalent compound is composed of _____ a. two non-metals b.a metal and a non-metal c.two metalloids d. either a or c

d. either a or c

the numerical rating of an atoms ability to attract the shared electrons is called___? a. ionization b.redistribution c.covalency d.electonegativity

d. electronegativity

the compound HClO is called a.perchloric acid b.hyperchloric acid c.hydrochloric acid d.hypochlrous acid

d. hypochlrous acid

which is the only ion that has a -3 charge? a.chromate b.ammonium c.chlorate d.phosphate

d. phosphate

which of the following polyatomic ions is the most negatively charged? a.acetate b.carbonate c.ammonium d.phosphate

d. phosphate

consider a bond A-B. if the difference in elctronegativity is 1.0, the bond is considered____ a. ionic b.covalent c.hydrogen d.polar covalent

d. polar covalent

what is the chemical name of the compound whose formula is K20? a. dipotassium oxygen b.potassium oxygen c.potasside oxygen d.potassium oxide

d. potassium oxide

how many resonance structure could be drawn for the nitrate ion? a.2 b.0 c.1 d.3

d.3

the number of valence electrons in silicon is ____ a.8 b.6 c.2 d.4

d.4

what is the number of single bonds in C2H60? a.6 b.5 c.7 d.8

d.8

the formula for sodium sulfite is ____ a. Na2S b. Na2SO4 c.Na2S2O3 d.Na2SO3

d.Na2SO3

which phrase best describes a covalent bond between two atoms? a.an exchange of nuclei between two atoms b.a stable arrangement of charged atoms held together by electrostatic forces c. uncommon, as electrons are free to jump from one atom to another d.a stable arrangement of atoms made by sharing two electrons between adjacent atoms

d.a stable arrangement of atoms made by sharing two electrons between adjacent atoms

which of the following is a binary ionic compound ? a.sulfur hexaflouride b.water c.phosphorus trichloride d.potassium sulfide

d.potassium sulfide

T or F Ca3P2 may be called calcium phosphate

false

T or F in the set H,S,Cl,Na sulfer is the most electronegative

false

T or F ion P-3 is name phosphate

false

T or F the electrons in a carbon-chlorine covalent bond are "shared" exactly equally between these two atoms

false

T or F the perchlorate, phosphate and sulfate anions have the same number of hydrogen atoms

false

T or F when covalent bonds are broken energy is released

false

which of the following is the most electronegative? a. oxygen b.sodium c.fluorine d.carbon

fluorine

Carbon dioxide

has only double bonds

oxygen

has only double bonds

hydrogen cyanide

has only single bond(s) and one double

ammonia

only single bonds

ethene

only single bonds

T o F another name for the hydrogen sulfate anion is bisulfate

true

T or F Carbon may have +4 and -4 charge

true

T or F Fe(OH) 2 may also be called ferrous hydroxide

true

T or F Hydrogen cyanide may also be called hydrocyanic acid when in aqueous solution

true

T or F a chemical compound formed from lithium and chlorine should be ionic in character

true

T or F a single , neutral chlorine atom has seven valence electrons

true