Atomic Structure and Isotopes (4E)
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QUESTION
Find the number of protons, neutrons, and electrons in neutral
11
23
Na
^{23}_{11}\text{Na}
11
23
Na
.
QUESTION
Find the number of electrons in
26
56
Fe
3
+
^{56}_{26}\text{Fe}^{3+}
26
56
Fe
3
+
.
QUESTION
Find the number of neutrons in
17
37
Cl
^{37}_{17}\text{Cl}
17
37
Cl
.
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ANSWER
20
20
20
neutrons. Neutron number is calculated as mass number minus atomic number:
37
−
17
=
20
37 - 17 = 20
37
−
17
=
20
.
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