Question

As compared to ${ }^{12} C$ atom, ${ }^{14} C$ atom has

• A. two extra protons and two extra electrons
• B. two extra protons but no extra electrons
• C. two extra neutrons and no extra electrons
• D. two extra neutrons and two extra electrons

Answer 1

Answer: (C)

For ${ }_{6}^{12} C , A=12=N+Z, Z=6$
$\Rightarrow N=6$
For ${ }_{6}^{14} C ; A=14=N+Z, Z=6$
$\Rightarrow N=8$
Also, number of electrons in both atoms
$=$ number of protons $=Z=6$.