(a) How many (i) electrons and (ii) neutrons has $^{18}_{C}$ ? - Leaving Cert Chemistry - Question a - 2003
Question a
(a) How many (i) electrons and (ii) neutrons has $^{18}_{C}$ ?
Worked Solution & Example Answer:(a) How many (i) electrons and (ii) neutrons has $^{18}_{C}$ ? - Leaving Cert Chemistry - Question a - 2003
Step 1
(i) How many electrons has $^{18}_{C}$?
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Answer
To determine the number of electrons in a neutral atom of carbon-18, we refer to the atomic number of carbon, which is 6. Since a neutral atom has an equal number of protons and electrons, C18 will have 6 electrons.
Step 2
(ii) How many neutrons has $^{18}_{C}$?
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Answer
The number of neutrons can be calculated using the formula:
N=A−Z
where:
N is the number of neutrons
A is the mass number (18 in this case)
Z is the atomic number (6 for carbon)
Thus, N=18−6=12. Therefore, C18 has 12 neutrons.
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