Chem Flashcards
Study unit 5
Nonmetal elements typically have __ Electronegativity
Neutral
low
high
strong
none of the above
High
Arrange the following elements from increasing electronegativity
Be, F, N, C
Be<C<N<F
Metals Typically have __ Electronegativity
Values
Negative
No
High
Low
two of the above
Low
Which of the following elements has the lowest electronegativity? **
Ca
Na
S
Cl
Rb
Rb
Which of the following ions has the same electron configuration as an argon atom?
**
Br-
Ca+
K+
P^3+
S3+
K+
Calcium reacts with fluorine to form **
CaF2
Ca2F
CaF
Ca2F3
None of the above
CaF2
A phosphorus atom needs to gain __ electrons to achieve a noble gas configuration
6
5
2
4
3
3
Which of the following is the product of the reaction Al + O2—>?
**
AlO
Al3O2
AlO2
ALO3
AL2O3
AL2O3
How many single double and triple bonds of electrons are in a molecule of HNC
**
1 single, 1 double, 0 Triple bonds
2 single, 0 double, 0 Triple bonds
1 single, 0 double, 1 Triple bonds
0 single, 2 double, 0 Triple bonds
0 single, 1 double, 1 Triple bonds
1 single, 0 double, 1 Triple bonds
How many bonded pairs of electrons are in a molecule of C02
4
0
3
1
2
4
How many lone pairs of electrons are in the molecule CH4
3
4
2
0
1
0
How many lone pairs are in the molecule of H2
4
6
2
8
0
0
Atoms with greatly differing electronegativity values are expected to form **
nonpolar covalent bonds
ionic bonds
no bonds
triple bonds
polar covalent
ionic bonds
One of the most important characteristics of the the water molecule is its___, which allows it to surround and attract both positive and negative ions
Polarity
Stability
Fluidity
Strength
Magnetism
Polarity
Rank the following bonds from least polar to most Polar **
Si-Cl, P-Cl Mg-Cl, S-Cl
S-Cl, P-Cl, Si-Cl, Mg-Cl
