Email
Chat with tutors
Login
Ask Questions, Get Answers
Menu
X
home
ask
tuition
questions
practice
papers
mobile
tutors
pricing
X
Questions
>>
JEEMAIN and NEET
>>
NEET PAST PAPERS
>>
2016
Next similar question
Answer
Comment
Share
Q)
The electronic configurations of Eu (Atomic No. 63), Gd(Atomic No. 64) and Tb (Atomic No. 65) are:
( A )
[
X
e
]
4
f
7
6
s
2
,
[
X
e
]
4
f
7
5
d
1
6
s
2
a
n
d
[
X
e
]
4
f
9
6
s
2
( B )
[
X
e
]
4
f
6
5
d
1
6
s
2
,
[
X
e
]
4
f
7
5
d
1
6
s
2
a
n
d
[
X
e
]
4
f
9
6
s
2
( C )
[
X
e
]
4
f
6
5
d
1
6
s
2
,
[
X
e
]
4
f
7
5
d
1
6
s
2
a
n
d
[
X
e
]
4
f
8
5
d
1
6
s
2
( D )
[
X
e
]
4
f
7
6
s
2
,
[
X
e
]
4
f
8
6
s
2
a
n
d
[
X
e
]
4
f
8
5
d
1
6
s
2
Share
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
Found
1
answer. Click to login & view.
Next Similar Question >
Home
Ask
Tuition
Questions
Practice
Your payment for
is successful.
Continue
...
Please Wait