Login
Login
Sign up
Start
Mathmania
Teacher tutorials
TOP
Subjects
Bridge Course
Testworks
Subject updates
Ya+
News
Send feedback
See more
Contacts
About Us
Terms and Conditions
Privacy Policy
PDF chapter test
TRY NOW
Subjects
Science State Board
Class 9
Atomic structure
Textbook questions
5.
Fill in the blanks
Exercise condition:
5
m.
1
.
Calcium and argon are examples of a pair of
isobar
isotope
.
2
.
Total Number of electrons that can be accommodated in an orbit is given by
\(2n^3\)
\(2n^2\)
.
3
.
Radio
Non-radio
Stable
isotope is used in the nuclear reactors.
4
.
The number of neutrons present in \(_{3}\textrm{Li}^{7}\)
\(3\)
\(7\)
\(4\)
.
5
.
The valency of Argon is
\(0\)
\(1\)
\(2\)
.
Login
or
Fast registration
Previous exercise
Exit to the topic
Next exercise
Send feedback
Did you find an error?
Send it to us!