Write the atomic number of an element which has mass number $23$ and number of neutrons $12$ in the nucleus.
(11) The atomic number $(Z)$ is equal to the number of protons in the nucleus of an atom.
The mass number $(A)$ is the sum of the number of protons and the number of neutrons in the nucleus.
$A = \text{Number of Protons} + \text{Number of Neutrons}$
Given:
Mass number $(A)$ = $23$
Number of neutrons = $12$
Substituting the values:
$23 = \text{Number of Protons} + 12$
Number of Protons = $23 - 12 = 11$
Since the number of protons is equal to the atomic number $(Z)$, the atomic number is $11$.
The mass number $(A)$ is the sum of the number of protons and the number of neutrons in the nucleus.
$A = \text{Number of Protons} + \text{Number of Neutrons}$
Given:
Mass number $(A)$ = $23$
Number of neutrons = $12$
Substituting the values:
$23 = \text{Number of Protons} + 12$
Number of Protons = $23 - 12 = 11$
Since the number of protons is equal to the atomic number $(Z)$, the atomic number is $11$.
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Atomic Number
Mass Number
Number of Neutrons
Number of Protons
Number of Electrons
Name of the Atomic Species
$9$
-
$10$
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$16$
$32$
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sulphur
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$24$
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$12$
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$2$
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$1$
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$1$
$0$
$1$
$0$
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| Atomic Number | Mass Number | Number of Neutrons | Number of Protons | Number of Electrons | Name of the Atomic Species |
| $9$ | - | $10$ | - | - | - |
| $16$ | $32$ | - | - | - | sulphur |
| - | $24$ | - | $12$ | - | - |
| - | $2$ | - | $1$ | - | - |
| - | $1$ | $0$ | $1$ | $0$ | - |
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