Test: Chenical Bonding Flashcards
1
Q
- Molecular compounds do not conduct electricity because they
A
Do not break up into ions.
2
Q
- What is a characteristic property of ionic compounds.
A
They form hard, brittle crystals with characteristic shapes.
3
Q
- Give an example of a molecule
A
H2O
4
Q
- How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable.
A
8
5
Q
- A chemical bond formed when two atoms share electrons is called a
A
Covalent bond
6
Q
- Which statement provides the best description of a covalent bond.
A
The attraction between atoms when they share electrons
7
Q
- When an atom loses an electron, it becomes a
A
Positive ion
8
Q
- Which is a property shared by most molecular compounds
A
Low melting point
9
Q
- Atoms become positive ions by
A
Losing electrons
10
Q
- Ionic compounds are elctrically
A
Neutral
11
Q
- A group of covalently bonded atoms that acts together as one charged atom is a
A
Polyatomic ion
12
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
13
Q
- What is the correct name for the name for a compound between Phosphorus and Chlorine.
A
Phosphorus trichloride
14
Q
- When an atom gains an electron it becomes a POSITIVE ion.
A
False negative
15
Q
- The attraction between a positive ion and a negative ion results in A COVALENT bond.
A
False an ionic
