Test - Chemical Bonding Flashcards
(29 cards)
1
Q
- Molecular compounds do not conduct electricity because they
A
Do not break up into ions
Nb 9
2
Q
- Which of the following is a characteristic property of ionic compounds.
A
They form hard, brittle crystals with characteristic shapes nb 9
3
Q
- Which of the following is an example of a molecule.
A
H2O nb 10
4
Q
- What is a double bond
A
Two pairs of electrons shared between four atoms
Nb 22
5
Q
- The chemical bond formed when two atoms share electrons is called a
A
Covalent bond nb 22
6
Q
- Which statement provides best description of a covalent bond.
A
The attraction between atoms when they share electrons nb 22
7
Q
- Which pair of atoms will combine with each other and form an ionic bond
A
Ca and Br nb 23
8
Q
- When an atom loses an electron, it becomes a
A
Positive ion nb 11
9
Q
- Anions are formed by
A
Gaining electrons nb 3
10
Q
- Which is a property shared by most molecular compounds
A
Low melting points nb22
11
Q
- Ions that are made of more than one atom are examples of
A
Polyatomic ions nb 3
12
Q
- Electrons involved in the formation of chemical bonds are called
A
Valence electrons nb 4
13
Q
- Atoms become positive ions by
A
Losing electrons nb 9
14
Q
- Ionic compounds are electrically
A
Neutral nb 9
15
Q
- What is the chemical name for the compound with the formula Na2S
A
Sodium sulfide nb 24
16
Q
- In the chemical formula for an ionic compound, which item is written first
A
Positive ion nb 22
17
Q
- A group of covalently bonded atoms that acts together as one charged atom is a
A
Crystal nb 23
18
Q
- Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the 2 tell you
A
There are two bromide ions for every magnesium ion nb 22
19
Q
- Which of the following is the correct name for a compound between Phosphorous and Chlorine
A
Phosphorous trichlorine nb 22
20
Q
- When an atom gains an electron it becomes a _____ ion
A
Negative nb 10
21
Q
- When electrons are ________ between two atoms, a covalent bond is formed.
A
Shared nb 23
22
Q
- Nitrate ,ammonium and carbonate are examples of ____ ions
A
Polyataomic nb 12
23
Q
- When ions having a positive change form bonds with ions having a negative charge, the charge on the resulting compound is
A
Zero nb 9
24
Q
- When an ionic compound forms , the total number of positive charges and the total number of negative charges must be
A
Equal nb 9
25
62. P4O6
Tetraphosphorous hexaoxide 13
26
66. Sr(CLO3)2
Strontium chlorite nb 19
27
71. What type of bond is formed between two oxygen atoms. Explain specifacally what will happen to form the bond.
Covalent 2 oxygen atoms form a double bond by sharing 4 e- between them nb 22
28
60. Triboron heptahydride
B3H7 nb 19
29
67. Fe(CO3J)2
Iron (IV) Carbonate nb 19
