Question

how many neutrons are in carbon - 14? helium 2 he 4.0026 boron 5 b 10.811 carbon 6 c 12.011 nitrogen 7 n 14.007 oxygen 8 o 15.999 fluorine 9 f 18.998 neon 10 ne 20.180 aluminium 13 al 26.982 silicon 14 si 28.086 phosphorus 15 p 30.974 sulfur 16 s 32.065 chlorine 17 cl 35.453 argon 18 ar 39.948 6 8 14 12

Explanation:

Step1: Recall atomic - number concept

The atomic number of carbon is 6, which means the number of protons in carbon is 6.

Step2: Use mass - number formula

The mass - number of carbon - 14 is 14. The mass - number (A) is the sum of the number of protons (p) and neutrons (n), i.e., $A=p + n$.

Step3: Calculate the number of neutrons

We know $A = 14$ and $p=6$. Rearranging the formula $n=A - p$. Substituting the values, we get $n = 14-6=8$.

Answer:

8