Test: Chenical Bonding

Question 1

1. Molecular compounds do not conduct electricity because they

Answer 1

Do not break up into ions.

Question 2

2. What is a characteristic property of ionic compounds.

Answer 2

They form hard, brittle crystals with characteristic shapes.

Question 3

12. Give an example of a molecule

Answer 3

H2O

Question 4

15. How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable.

Answer 4

8

Question 5

19. A chemical bond formed when two atoms share electrons is called a

Answer 5

Covalent bond

Question 6

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

Answer 6

The attraction between atoms when they share electrons

Question 7

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

Answer 7

Positive ion

Question 8

27. Which is a property shared by most molecular compounds

Answer 8

Low melting point

Question 9

34. Atoms become positive ions by

Answer 9

Losing electrons

Question 10

35. Ionic compounds are elctrically

Answer 10

Neutral

Question 11

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

Answer 11

Polyatomic ion

Question 12

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

Answer 12

There are two bromide ions for every magnesium ion

Question 13

40. What is the correct name for the name for a compound between Phosphorus and Chlorine.

Answer 13

Phosphorus trichloride

Question 14

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

Answer 14

False negative

Question 15

43. The attraction between a positive ion and a negative ion results in A COVALENT bond.

Answer 15

False an ionic

Question 16

52. What type of bond is formed between Sodium and Chlorine? Explain specifically what will happen to form the bond.

Answer 16

Na gives its 1 valence e- to CL —- Na+1

Question 17

53. Why do noble gasses form compounds?

Answer 17

Because they are already stable —- their outermost energy levels are already complete.

Question 18

55. Magnesium sulfate

Answer 18

MgSO4

Question 19

56. Tetracarbon decahydride

Answer 19

C4HO

Question 20

61. Manganese (III) Oxide

Answer 20

Mn2O3

Question 21

62. P4O6

Answer 21

Tetraphosphorus hexaoxide

Question 22

64. CF4

Answer 22

Carbon tetraflouride

Question 23

65. N2O

Answer 23

Dinitrogen monoxide

Question 24

66. Sr(ClO3)2

Answer 24

Strontium chlorate

Question 25

67. Fe(CO3)2

Answer 25

Iron (IV) Carbonate

Question 26

71. What type of bond is formed between two oxygen atoms?

Answer 26

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