Question

indicate the number of protons and neutrons in carbon - 14. protons 8 neutrons 8 question 4 indicate the number of protons and neutrons in uranium - 238. protons 146 neutrons 146

Explanation:

Step1: Recall atomic number of carbon

The atomic number of carbon (C) is 6. The number of protons is equal to the atomic number. So for carbon - 14, the number of protons is 6.

Step2: Calculate number of neutrons for carbon - 14

The mass number of carbon - 14 is 14. The number of neutrons $n$ is calculated by subtracting the number of protons $p$ from the mass number $A$. So $n=A - p=14 - 6 = 8$.

Step3: Recall atomic number of uranium

The atomic number of uranium (U) is 92. So the number of protons in uranium - 238 is 92.

Step4: Calculate number of neutrons for uranium - 238

The mass number of uranium - 238 is 238. Using the formula $n = A - p$, we have $n=238 - 92=146$.

Answer:

protons in carbon - 14: 6
neutrons in carbon - 14: 8
protons in uranium - 238: 92
neutrons in uranium - 238: 146