Download 3/12/2010 1 Arrange the following atoms in order of increasing

3/12/2010
Arrange the following atoms in order
of increasing atomic radius.
N F Si P
1. F
20% 2.
N
20% 3.
N
20% 4.
F
20% 5.
Si
20%
<
<
<
<
<
N
F
F
N
P
<
<
<
<
<
P
P
Si
Si
N
<
<
<
<
<
Which of the following species has the
largest radius?
20%
Si
Si
P
P
F
20%
20%
20%
20%
1.
2.
3.
4.
5.
S2–
Cl–
Ar
K+
Ca2+
10
10
Which of the following is a possible set
of quantum numbers for an electron in
a 4d atomic orbital?
17% 1.
17% 2.
17% 3.
17% 4.
17% 5.
n
4
4
4
4
4
l
4
3
2
1
0
ml
3
2
1
0
–1
s
+½
+½
+½
+½
+½
How many valence electrons are there
in the Fe2+ ion?
20%
20%
20%
20%
20%
10
1. 2
2. 4
3. 6
4. 8
5. 26
10
Which one of the following statements
is true?
20% 1. Electrostatic interactions are directional.
.......
2.
In
metallic bonds all the electrons are
20%
localised on the atom.
3. Covalent bonds are generally composed of a
20%
single electron between two nuclei.
4. Covalent compounds conduct electricity
20%
when liquid.
5. A bond between elements from groups 2 &
20%
16 is expected to be ionic.
10
1