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QUIZ 4

front 1

1. A molecule that has a single covalent bond is _____.
A. CO2
B. CO
C. Cl2

back 1

C

front 2

2. how many valence electrons does PO43- has?
A. 29
B. 30
C. 31
D. 32

back 2

D

front 3

3. Which one of the following elements does not exist as a diatomic molecule in nature?
A. hydrogen
B. nitrogen
C. neon

back 3

C

front 4

4. Which one of these compounds is an ionic compound?
A. Na2O
B. CO2
C. N2

back 4

A

front 5

5. According to periodic trends, which element is the most electronegative?
A. Ne
B. O
C. F

back 5

C

front 6

6. What is the electron group (EG) and molecular geometry (MG) of an ammonia molecule?
A. (EG) tetrahedral and (MG) tetrahedral
B. (EG) tetrahedral and (MG) trigonal pyramidal
C. (EG) tetrahedral and (MG) bent

back 6

B

front 7

7. Write the formulas of the following compound: silicon dioxide

A. SiO
B. Si2O
C. SiO2

back 7

C

front 8

8. Based off periodic trends, which of the following has the strongest lattice energy?
A. aluminum chloride
B. calcium chloride
C. sodium chloride

back 8

A

front 9

9. How do the molecular geometry of the molecule IF5 and PF5 differ?
A. In IF5, there is a lone pair of electrons on iodine where as in PF5 there are no lone pairs on phosphorus. As a result, the molecular shape of IF5 is square pyramidal and PF5 is trigonal bipyramidal.
B. In PF5, there is a lone pair of electrons on phosphorus where as in IF5 there are no lone pairs on iodine. As a result, the molecular shape of PF5 is square pyramidal and IF5 is trigonal bipyramidal.
C. In IF5, there is a lone pair of electrons on iodine where as in PF5 there are no lone pairs on phosphorus. As a result, the molecular shape of IF5 is octahedral and PF5 is trigonal bipyramidal.

back 9

A

front 10

10. What are the bond angle formed by the central atom P and two of the equatorial fluorine’s in the molecular geometry of PF5 ? trigonal bipyramidial
A. 90°
B. 120°
C. 109.5°

back 10

B

front 11

11. Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 4 electron groups (3 bonds and 1 lone pair electrons).
A. tetrahedral, trigonal pyramidal, >109.5°
B. tetrahedral, trigonal pyramidal, <109.5°
C. tetrahedral, trigonal pyramidal, 109.5°

back 11

B

front 12

12. Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 6 electron groups (5 bonds and 1 lone pair electrons).
A. octahedral, octahedral, 90°
B. octahedral, square planar, 90°
C. octahedral, square pyramidal, 90°

back 12

C

front 13

13. What are the bond angle in the molecular geometry of H2O?
A. 104.5°
B. 107°
C. 109.5°

back 13

A

front 14

14. What are the bond angle in the molecualre geomerty of CH4?
A. 104.5°
B. 107°
C. 109.5°

back 14

C

front 15

15. Write the formulas of the following compound: potassium phosphide
A. KP
B. K2P
C. K3P

back 15

C

front 16

16. According to the octet rule, a magnesium atom has a tendency to

A. lose one electron.
B. lose two electrons.
C. gain one electron. Mg^2+

back 16

B

front 17

17. According to the octet rule, a bromine atom has a tendency to

A. lose one electron.
B. lose two electrons.
C. gain one electron.

back 17

C

front 18

18. How many electrons are shared in a single covalent bond?
A. 2
B. 3
C. 1

back 18

A

front 19

19. A molecule that has a triple covalent bond is _____.
A. HCN
B. CO2
C. H2O

back 19

A

front 20

20. Which of the following diatomic molecules is joined by a double covalent bond?
A. Cl2
B. O2
C. N2

back 20

B

front 21

21. What’s the molecualr shape of BCl3.
A. linear
B. bent
C. trigonal planar

back 21

C

front 22

22. What is the molecular shape of CO2?
A. linear
B. bent
C. trigonal planar

back 22

A

front 23

23. Which molecule has only covalent bonds?
A. CO2
B. Al2O3
C. Mg3N2

back 23

A

front 24

24. The octet rule states that main group elements in the periodic table react to achieve a filled valence shell which consists of how many electrons?
A. 2
B. 4
C. 8

back 24

C

front 25

25. Which of the following elements are found in the p-block and can form an octet?
A. He, P, S, As
B. P, S, O, C
C. He, Ar, Kr, Ne

back 25

B

front 26

26. Based off molecular polarity determined by VSEPR theory, which of the following would be insoluble in CCl4?
A. methanol CH3OH
B. octane CH3CH2CH2CH2CH2CH2CH2CH3 non polar
C. hexane CH3CH2CH2CH2CH2CH3 nonpolar

back 26

A

front 27

27. Based off molecular polarity determined by VSEPR theory, in which solvent would glucose be the least soluble?
A. CH3CH2OCH2CH3
B. CH3OH
C. H2O

back 27

A

front 28

28. Why are detergents and soaps good at cleaning up oily stains from dishes or clothing?
A. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (polar) and hydrophobic (nonpolar) ends. The hydrophobic end attaches to oils via hydrogen bonds creating micelles which leave the hydrophilic part exposed and can be washed away by water.
B. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (non-polar) and hydrophobic (polar) ends. The hydrophobic end attaches to oils via London forces creating micelles which leave the hydrophilic part exposed and can be washed away by water.
C. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (polar) and hydrophobic (nonpolar) ends. The hydrophobic end attaches to oils via London forces creating micelles which leave the hydrophilic part exposed and can be washed away by water.

back 28

C

front 29

29. Which of the following molecules has a voilation of octet rule?
A. NO2
B. PF5
C. BeCl2
D. all the above

back 29

D

front 30

30. How many non-polar bonds does CH3OH contain?
A. 2
B. 3
C. 4

back 30

B