i b Chem 1 Pract Test Bonding

7/26/2019 i b Chem 1 Pract Test Bonding

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Practice Test: Chemical Bonding and Shapes of Molecules

1. A type of chemical bond that is formed from the attraction of an atom that has lost an electron for an atomthat has gained an electron is called a(n)

A. covalent bond.B. ionic bond.

C. metallic bond

D. hydrogen bond

2. A type of chemical bond that is consists of positive ions in a sea of electrons a(n)

A. covalent bond.

B. ionic bond.

C. metallic bondD. hydrogen bond

3. A wea attraction between a hydrogen atom in one molec!le and an oxygenin another is called a(n)

A. ionic bond.

B. covalent bondC. metallic bond

D. hydrogen bond

4. A pure substance melts at 88C and does not conduct electricity in either the solid state or the liquid state.

It does not dissolve very well in water but it does dissolve in nonpolar solvents is most likely to be

A. a metalB. a network solidC. an ionic compound

D. a covalent compound

5. A pure substance does not conduct electricity in the solid state but it does dissolve in water and the

resulting solution conducts electricity. The substance has a fairly high melting point. The substance is most

likely to be

A. an ionic compound

B. a covalent compoundC. a metalD. a network solid

". #n a $ewis dot str!ct!re the dots represent

A. atomic n!clei

B. valence electrons

C. ernel electronsD. protons


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7. The total number of valence electrons in a molecule of CO2is

A. 4

B. 6

C. 16D. 18

%. &hen covalent bonds are formed between atoms having different electronegativities' the electrons tend tospend more time at the atom with the greater electronegativity. !ch chemical bonds are called

A. electrovalent bondsB. polar covalent bonds

C. coordinate covalent bonds

D. none of the above

. A negatively charged ion attracts a(n)

A. anionB. cationC. ne!tral atom

D. proton

*se the electronegativity scale below to answer the ne+t two ,!estions

Element Electronegativity

- ./

0 3.Cl 3./

Br 2.%

2.

2.1

Al 1.

g 1.2

Ca 1./

$i /.

4a /.5 /.%

10. Which pair of elements is mostlikely to form a covalently bonded compound?

A. Li and ClB. S and O

C. Ca and S

D. Na and BrE. K and F


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11. &hich of these is most ionic

A. AlCl3

B. BaCl2

C. 4a-D. gBr

2

6. 2

12. 7he correct name for the compo!nd whose form!la is C!20

3is

A. Copper (##) !lfateB. Copper (##) !lfite

C. Copper (#) !lfate

D. Copper (#) !lfite6. Copper (#) s!lfide

13. Which of the electron dot structures above represents a carbon dioxide molecule?

A.

B.

C.

.

D.


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1. &hat ind of hybridi8ation is fo!nd in a C9C 7riple bond as in ethyne C::C;

A. sp

B. sp2

C. sp3

D. 4one of the above

1. &hen i'


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1. !lf!r 7rio+ide 03

2/. 4itrate #on 403

:

?ive the shape of each molec!le or ion below selected from this list

A. $inearB. Ang!lar or Bent

C. 7riang!lar


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2. 02;

2. 43;

2".


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Answer ey

1. B #onic bond2. C. etallic Bond

3. D ydrogen bond

. D covalent compound

. A An ionic compound

". B Valence Electrons

=. C 16 electrons%. B Polar covalent bonds

. B Cation (negative ions attract positive ions

1/. B S and O

11. C NaF has the greatest electronegativity difference

12. D Copper (I) sulfite

13. A

1. A sp

1. D H2'

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i b Chem 1 Pract Test Bonding