Test Chemical Bonding Flashcards
1
Q
- Molecular compounds do not conduct electricity because they _______
A
Do not break into ions
2
Q
- Which of the following is a characteristic property of ionic compounds?
A
Thy form hard, brittle crystals with characteristic shapes
3
Q
- The properties of a compound are _______ the properties of the element that form it
A
Different from
4
Q
- What is a double bond?
A
Two pairs of electrons shared between two atoms
5
Q
- Which of the following is a similarity between ionic an covalent bond?
A
Both make electrons more stable
6
Q
- Anions are formed by
A
Gaining electrons
7
Q
- Which is a property shared by most molecular compounds?
A
Low melting point
8
Q
- Electrons involved in the formation of chemical bonds are are called
A
Valence electrons
9
Q
- Which formula represents a substance that contains covalent bonds
A
CO2
10
Q
- Atoms become positive ions by
A
Losing electrons
11
Q
- What is the chemical name for the compound with the formula Na2S?
A
Sodium sulfide
12
Q
- A group of covalently bond atoms that acts together as one charged atom is a ______
A
Crystal
13
Q
- Magnesium bromide is an ionic compound with the chemical formula MgBr2. What ones the “2” tell you?
A
There are two bromide ions for every magnesium ion
14
Q
- Which of the following is the correct name for a compound between phosphorus and chlorine?
A
Phosphorus trichloride
15
Q
- When electrons are transferred between two atoms a covalent bond is formed
A
F, shared
16
Q
Chemical bonds form when valence electrons are ________ between atoms
A
Transferred/ shared
17
Q
- What type of one is formed between sodium and chlorine? Explain specifically what will happen to for the bond.
A
Na2S
18
Q
- Magnesium sulfate
A
Na2(SO4)
19
Q
- Beryllium acetate
A
Be(C2H3O2)2
20
Q
- Lead (II) chloride
A
PbCl2
21
Q
- Manganese (III) oxide
A
Mn2O3
22
Q
- Be3P2
A
Beryllium phosphate
23
Q
- Why do elements from compounds?
A
To be stable = full outermost energy level of valence e-
24
Q
- The attraction between a positive ion and a negative ion results in a covalent bond ______
A
F an ionic
25
41 when an atom gains an electron it becomes a positive ion
F negative
26
72 c. Write the chemical formula for the compound
CO2
27
69. Be3P2
Beryllium phosphide
