Question

1. an atom of carbon - 14 contains

a) 8 protons, 6 neutrons, and 6 electrons
b) 6 protons, 6 neutrons, and 8 electrons
c) 6 protons,8 neutrons, and 6 electrons
d) 6 protons,8 neutrons, and 8 electrons
5.. the atomic number of an element represents the number of:
a) neutrons b) protons
c) electrons + neutrons d) protons + neutrons

Explanation:

• For carbon - 14:
• The atomic number of carbon is 6. The atomic number \(Z\) is equal to the number of protons (\(p\)) and for a neutral atom, the number of electrons (\(e\)) is equal to the number of protons. So \(p = e=6\).
• The mass number \(A = 14\). The mass number \(A=p + n\) (where \(n\) is the number of neutrons). So \(n=A - p=14 - 6 = 8\).
• For the atomic number:
• By definition, the atomic number of an element is the number of protons in the nucleus of an atom of that element.

Answer:

1. C. 6 protons, 8 neutrons, and 6 electrons
2. B. Protons