chm compounds and their bonds 4

1) The octet rule indicates that A) all of the noble gases have eight total electrons. B) all of the shells in an atom hold a maximum of 8 electrons. C) all of the Group A elements have 8 valence electrons .D) atoms lose, gain, or share valence electrons to have 8 valence electrons. E) the noble gases react with other compounds to get 8 valence electrons.

.D) atoms lose, gain, or share valence electrons to have 8 valence electrons.

35) Which of the following compounds contains an ionic bond? A) NH3 B) H2O C) CaO D) H2 E) CH4

C) CaO

15) Which one of the following compounds contains an ion with a 3+ charge? A) KCl B) Na2O C) FeCl3 D) CuCl E) MgCl2

C) FeCl3

12) An ionic compound A) has a net positive charge. B) has a net negative charge. C) contains only cations. D) contains only anions. E) has a net charge of zero.

E) has a net charge of zero.

37) A polar covalent bond is found in which of these compounds? A) H2O B) F2 C) NaCl D) H2 E) N2

A) H2O

14) The correct formula for the compound formed from Mg and S is A) MgS. B) MgS2. C) Mg2S. D) Mg2S2. E) Mg2S3.

A) MgS.

42) What is the formula of the nitride ion? A) N3- B ) N O -2 C) NO3- 3 D) NO2- 3 E ) N O -3

A) N3-

44) What is the formula of a compound that contains Na+ and PO 3- ions? 4 A) Na3PO4 B) NaPO4 C) Na2PO3 D) Na3PO3 E) Na3P

A) Na3PO4

16) What is the correct formula for the oxide ion? A) O2- B) O C) O+ D) O2+ E) O3+

A) O2-

32) The ability of an atom to attract the shared electrons in a covalent bond is its A) electronegativity. B) bonding ability. C) polarity. D) ionic character. E) nonpolarity.

A) electronegativity

8) The number of electrons in an ion with 20 protons and an ionic charge of 2- is A) 24. B) 22. C) 20. D) 18. E) 16.

B) 22.

30) What is the formula of carbon tetraiodide? A) CI B) CI4 C) C4I D) CI3 E) C2I4

B) CI4

19) What is the correct formula for the iron (II) ion? A) Fe+ B) Fe2+ C) Fe3+ D) Fe2- E) Fe3-

B) Fe2+

34) Which of the following compounds contains a polar covalent bond? A) NaF B) HCl C) Br2 D) MgO E) O2

B) HCl

36) Ionic bonding is expected in which of these compounds? A) Cl2 B) KF C) OF2 D) HF E) H2

B) KF

20) The name of the Cu+ ion is A) copper (II). B) copper (I). C) copper (III). D) copper. E) cuprum.

B) copper (I).

11) How many electrons will chlorine gain or lose when it forms an ion? A) lose 1 B) gain 1 C) lose 7 D) gain 2 E) lose 3

B) gain 1

43) The name of the HSO -4 ion is A) sulfate. B) hydrogen sulfate. C) sulfite. D) hydrogen sulfite. E) sulfide.

B) hydrogen sulfate.

38) The bond in Cl2 is a(n) A) ionic bond. B) nonpolar covalent bond. C) metallic bond. D) polar ionic bond. E) no bond.

B) nonpolar covalent bond.

26) Double and triple bonds form because A) the atoms involved have high electronegativities. B) single covalent bonds do not give all of the atoms in the molecule eight valence electrons. C) one of the atoms in the molecule has more than 8 valence electrons. D) the ions involved have charges larger than one. E) there is at least one hydrogen atom involved in the bond.

B) single covalent bonds do not give all of the atoms in the molecule eight valence electrons.

9) Elements in group 2A(2) of the periodic table form ions with a charge of A) 1+ . B) 1- . C) 2+ . D) 3+. E) 0.

C) 2+ .

7) What is the ionic charge of an ion with 18 protons and 15 electrons? A) 1+ B) 2+ C) 3+ D) 2- E) 3-

C) 3+

10) The ion of aluminum is A) Al+. B) Al2+. C) Al3+. D) Al3-. E) Al2-.

C) Al3+.

27) The formula for a molecule formed from N and Cl would be A) NCl. B) NCl2. C) NCl3. D) N3Cl. E) NCl5.

C) NCl3.

45) Fe2(SO4)3 is called A) iron sulfate. B) iron (II) sulfate. C) iron (III) sulfate. D) diiron trisulfate. E) iron trisulfate.

C) iron (III) sulfate.

22) A(n) _____ is the smallest neutral unit of two or more atoms held together by a covalent bond. A) ionic compound B) nucleus C) molecule D) formula E) unit

C) molecule

39) A group of covalently bonded atoms that has an overall electrical charge is called a(n) A) ionic compound. B) anion. C) polyatomic ion. D) cation. E) molecule.

C) polyatomic ion.

40) Which of the following polyatomic ions has a positive charge? A) hydroxide B) cyanide C) hydrogen carbonate D) ammonium E) nitrate

D) ammonium

23) In a molecule with covalent bonding, A) oppositely charged ions are held together by strong electrical attractions. B) atoms of metals form bonds to atoms of nonmetals. C) atoms of different metals form bonds. D) atoms are held together by sharing electrons. E) atoms of noble gases are held together by attractions between oppositely charged ions.

D) atoms are held together by sharing electrons.

28) According to naming rules, the types of compound that use prefixes in their names are A) ionic compounds. B) ionic compounds involving transition metals. C) polyatomic ions. D) covalent compounds. E) compounds that contain polyatomic ions.

D) covalent compounds.

3) How many electrons will aluminum gain or lose when it forms an ion? A) lose 1 B) gain 5 C) lose 2 D) lose 3 E) gain 1

D) lose 3

5) To form an ion, a sodium atom A) gains one electron. B) gains two electrons. C) loses seven electrons. D) loses one electron .E) loses two electrons.

D) loses one electron.

17) The compound MgCl2 is named A) magnesium chlorine. B) magnesium dichloride. C) magnesium (II) chloride. D) magnesium chloride. E) dimagnesium chloride.

D) magnesium chloride.

41) Which of the following polyatomic ions has a 3- ionic charge? A) hydroxide B) nitrate C) sulfate D) phosphate E) hydrogen carbonate

D) phosphate

13) The correct formula for a compound formed from the elements Al and O is A) AlO. B) Al2O . C) Al3O2 . D) AlO3 . E) Al2O3 .

E) Al2O3

18) Which one of the following elements forms two or more ions with different ionic charges? A) K B) F C) Ca D) O E) Fe

E) Fe

21) What is the correct formula for iron (III) sulfide? A) Fe2S2 B) Fe2S C) FeS D) FeS2 E) Fe2S3

E) Fe2S3

4) What is the symbol for the ion with 19 protons and 18 electrons? A) F+ B) F- C) Ar+ D) K- E) K+

E) K+

33) Which of the following substances contains a nonpolar covalent bond? A) H2O B) NaCl C) NH3 D) MgF2 E) N2

E) N2

31) The name of Al2(SO4)3 is A) aluminum(III) sulfate. B) dialuminum trisulfate. C) dialuminum sulfate. D) dialuminum trisulfide. E) aluminum sulfate.

E) aluminum sulfate.

24) Which of the following elements does NOT exist as a diatomic molecule? A) hydrogen B) nitrogen C) chlorine D) oxygen E) carbon

E) carbon

29) The correct name for the compound N2O3 is A) nitrogen oxide. B) nitrogen trioxide. C) dinitride trioxide. D) dinitrogen oxide. E) dinitrogen trioxide.

E) dinitrogen trioxide.

6 ) An anion always A) has a positive charge. B) contains a group of two or more atoms with a positive charge. C) contains a metal and a nonmetal. D) forms covalent bonds. E) has a negative charge.

E) has a negative charge.

2) In ionic compounds, _____ lose their valence electrons to form positively charged _____. A) metals, anions B) nonmetals, cations C) metals, polyatomic ions D) nonmetals, anions E) metals, cations

E) metals, cations

25) In a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal to the number of electrons A) in the atom. B) in its nucleus. C) in all the atoms. D) in its ion. E) needed to give it a noble gas arrangement.

E) needed to give it a noble gas arrangement.