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Subjects
Science State Board
Class 9
Atomic structure
Atomic particles - Rutherford’s and Bohr’s models
13.
Number of electrons and protons: Numerical based questions
Exercise condition:
2
m.
1
.
Find out the number of electrons revolve around the nucleus of
Cr
.
Z
of
Cr
=
24
.
Answer:
2
.
Calculate the number of protons in the nucleus of
Li
.
Z
of
Li
=
3
Answer:
1
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