An atom which has a mass number of 14 and has 8 neutrons is an:

Options

A. isotope of oxygen
B. isobar of oxygen
C. isotope of carbon
D. isobar of carbon

Answer

To solve the question "An atom which has a mass number of 14 and has 8 neutrons is an:", we will follow these steps:

### Step 1: Understand the Definitions
- **Mass Number (A)**: The total number of protons and neutrons in an atom.
- **Atomic Number (Z)**: The number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

### Step 2: Calculate the Number of Protons
Given:
- Mass Number (A) = 14
- Number of Neutrons (N) = 8

Using the formula:
\[ A = Z + N \]
We can rearrange this to find the number of protons (Z):
\[ Z = A - N \]
Substituting the values:
\[ Z = 14 - 8 = 6 \]

### Step 3: Identify the Element
The atomic number (Z) we calculated is 6. Referring to the periodic table:
- An atomic number of 6 corresponds to the element Carbon (C).

### Step 4: Determine the Type of Atom
Now we need to identify if this atom is an isotope or isobar:
- **Isotope**: Atoms of the same element with the same atomic number but different mass numbers.
- **Isobar**: Atoms of different elements with the same mass number.

Since we have determined that the atomic number is 6 (Carbon) and the mass number is 14, we can conclude:
- This atom is a Carbon isotope because it has the same atomic number as Carbon but a different mass number compared to the most common isotope of Carbon (which is Carbon-12).

### Conclusion
An atom which has a mass number of 14 and has 8 neutrons is an **isotope of Carbon**.

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