Test - Chemical Bonding

Question 1

1. Molecular compounds do not conduct electricity because they

Answer 1

Do not break up into ions

Nb 9

Question 2

2. Which of the following is a characteristic property of ionic compounds.

Answer 2

They form hard, brittle crystals with characteristic shapes nb 9

Question 3

12. Which of the following is an example of a molecule.

Answer 3

H2O nb 10

Question 4

16. What is a double bond

Answer 4

Two pairs of electrons shared between four atoms

Nb 22

Question 5

17. The chemical bond formed when two atoms share electrons is called a

Answer 5

Covalent bond nb 22

Question 6

20. Which statement provides best description of a covalent bond.

Answer 6

The attraction between atoms when they share electrons nb 22

Question 7

21. Which pair of atoms will combine with each other and form an ionic bond

Answer 7

Ca and Br nb 23

Question 8

22. When an atom loses an electron, it becomes a

Answer 8

Positive ion nb 11

Question 9

26. Anions are formed by

Answer 9

Gaining electrons nb 3

Question 10

27. Which is a property shared by most molecular compounds

Answer 10

Low melting points nb22

Question 11

29. Ions that are made of more than one atom are examples of

Answer 11

Polyatomic ions nb 3

Question 12

31. Electrons involved in the formation of chemical bonds are called

Answer 12

Valence electrons nb 4

Question 13

34. Atoms become positive ions by

Answer 13

Losing electrons nb 9

Question 14

35. Ionic compounds are electrically

Answer 14

Neutral nb 9

Question 15

36. What is the chemical name for the compound with the formula Na2S

Answer 15

Sodium sulfide nb 24

Question 16

37. In the chemical formula for an ionic compound, which item is written first

Answer 16

Positive ion nb 22

Question 17

38. A group of covalently bonded atoms that acts together as one charged atom is a

Answer 17

Crystal nb 23

Question 18

39. Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the 2 tell you

Answer 18

There are two bromide ions for every magnesium ion nb 22

Question 19

40. Which of the following is the correct name for a compound between Phosphorous and Chlorine

Answer 19

Phosphorous trichlorine nb 22

Question 20

41. When an atom gains an electron it becomes a _____ ion

Answer 20

Negative nb 10

Question 21

42. When electrons are ________ between two atoms, a covalent bond is formed.

Answer 21

Shared nb 23

Question 22

46. Nitrate ,ammonium and carbonate are examples of ____ ions

Answer 22

Polyataomic nb 12

Question 23

48. When ions having a positive change form bonds with ions having a negative charge, the charge on the resulting compound is

Answer 23

Zero nb 9

Question 24

49. When an ionic compound forms , the total number of positive charges and the total number of negative charges must be

Answer 24

Equal nb 9

Question 25

62. P4O6

Answer 25

Tetraphosphorous hexaoxide 13

Question 26

66. Sr(CLO3)2

Answer 26

Strontium chlorite nb 19

Question 27

71. What type of bond is formed between two oxygen atoms. Explain specifacally what will happen to form the bond.

Answer 27

Covalent 2 oxygen atoms form a double bond by sharing 4 e- between them nb 22

Question 28

60. Triboron heptahydride

Answer 28

B3H7 nb 19

Question 29

67. Fe(CO3J)2

Answer 29

Iron (IV) Carbonate nb 19