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Byju's Answer
Standard VII
Chemistry
Sub-Atomic Particles
Boron does no...
Question
Boron does not from
B
3
+
ions whereas
A
l
forms
A
l
3
+
i
o
n
s
. This because :
A
The size of
B
atom is smaller than that of
A
l
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B
The sun of
I
E
1
+
I
E
2
+
I
E
3
of
B
is equal to that of
A
l
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C
The sum of
I
E
1
+
I
E
2
+
I
E
3
of Al is much higher than that of
B
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D
Both A and B
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Solution
The correct option is
A
The size of
B
atom is smaller than that of
A
l
B has eletronic configuration
1
s
2
2
s
2
2
p
1
After removal of one electron electronic configuration becomes stable i.e full filled s - orbital.
So second IE becomes very high so, total
I
E
1
+
I
E
2
+
I
E
3
is very high and hence formation of
B
3
+
is impossible
And due to small size of B, it becomes very difficult to withdraw electrons
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1
Similar questions
Q.
The sum of
I
E
1
and
I
E
2
,
I
E
3
and
I
E
4
for
N
i
and
P
t
are given below
I
E
1
+
I
E
2
I
E
3
+
I
E
4
N
i
2.49
8.80
P
t
2.66
6.70
If true enter 1, else enter 0.
It can be predicted that
N
i
2
+
is more stable than
P
t
2
+
.
Q.
(
I
E
)
1
of Be is greater than that of B but
(
I
E
)
2
of (B) is greater than that of Be.If true enter 1, else 0.
Q.
The
I
E
1
I
E
2
I
E
3
I
E
4
I
E
5
of an element are
15.1
,
24.3
,
34.5
,
46.8
,
162.2
,
e
V
respectively. This element is likely to be :(I.E.=Ionisation energey )
Q.
I
E
2
for an element is invariably higher than
I
E
1
because
Q.
IE (in kJ
m
o
I
−
1
) of
L
i
and
B
e
are given below:
Z
(
I
E
)
1
(
I
E
)
2
(
I
E
)
3
L
i
3
520.1
X
(
1
)
11810
B
e
4
899.3
Y
(
2
)
14810
From above table
X
(
1
)
is higher than
Y
(
2
)
.
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