Sign up

Teacher tutorials

Subject updates

Terms and Conditions

PDF chapter test TRY NOW

Subjects
Science State Board
Class 9
Atomic structure
Textbook questions

1. Choose the correct answer I

Exercise condition:

3 m.

1. Among the following, the odd pair is

\(_{8}\textrm{O}^{18}\), \(_{9}\textrm{F}^{19}\)
\(_{18}\textrm{Ar}^{40}\), \(_{7}\textrm{N}^{14}\)
\(_{14}\textrm{Si}^{30}\), \(_{15}\textrm{P}^{31}\)
\(_{20}\textrm{Cr}^{40}\), \(_{19}\textrm{K}^{39}\)

2. Change in the number of neutrons in an atom changes it to

another element.
an isotope.
an ion.
an isobar.

3. The term nucleons refer to

only neutrons.
electrons and neutrons.
protons and neutrons.
protons and electrons.

Login or Fast registration

Exit to the topic

Did you find an error?

Register for free to see more content

Register for free to see more content

Copyright © 2024 YaClass Tech Private Limited Contacts Terms and Conditions Privacy Policy