What is the ratio of the neutrons present in Aluminium and Sulphur atoms with respect to their atomic mass of 27 and 32

Options

A. 14:16
B. 16:14
C. 7:8
D. 8:7

Explanation

To find the ratio of the neutrons present in Aluminium and Sulphur atoms with respect to their atomic mass, we will follow these steps:

### Step 1: Identify the Atomic Mass and Atomic Number
- The atomic mass of Aluminium (Al) is given as 27.
- The atomic mass of Sulphur (S) is given as 32.
- The atomic number of Aluminium (Al) is 13.
- The atomic number of Sulphur (S) is 16.

### Step 2: Calculate the Number of Neutrons
The number of neutrons in an atom can be calculated using the formula:
\[ \text{Number of Neutrons} = \text{Mass Number} - \text{Atomic Number} \]

#### For Aluminium:
- Mass Number = 27
- Atomic Number = 13
- Number of Neutrons in Aluminium:
\[ \text{Neutrons in Al} = 27 - 13 = 14 \]

#### For Sulphur:
- Mass Number = 32
- Atomic Number = 16
- Number of Neutrons in Sulphur:
\[ \text{Neutrons in S} = 32 - 16 = 16 \]

### Step 3: Calculate the Ratio of Neutrons
Now, we will find the ratio of the number of neutrons in Aluminium to the number of neutrons in Sulphur:
\[ \text{Ratio} = \frac{\text{Neutrons in Al}}{\text{Neutrons in S}} = \frac{14}{16} \]

### Step 4: Simplify the Ratio
To simplify the ratio \( \frac{14}{16} \):
- Divide both the numerator and the denominator by 2:
\[ \frac{14 \div 2}{16 \div 2} = \frac{7}{8} \]

### Final Answer
The ratio of the neutrons present in Aluminium and Sulphur atoms is \( 7:8 \).

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