Atomic number and mass number of an element `M` are `25` and `52` respectively. The number of electrons, protons and neutrons in `M^(+2)` ion are respectively.

Options

A. 25,25 and 27
B. `25,27 and 25`
C. ` 27 ,25 and 27`
D. `23,25 and 27`

Answer

To determine the number of electrons, protons, and neutrons in the ion \( M^{+2} \), we can follow these steps:

### Step 1: Identify the Atomic Number and Mass Number
The atomic number (Z) of element \( M \) is given as 25, and the mass number (A) is given as 52.

### Step 2: Determine the Number of Protons
The number of protons in an element is equal to its atomic number. Therefore, for element \( M \):
- Number of protons = Atomic number = 25

### Step 3: Determine the Number of Electrons in the Neutral Atom
In a neutral atom, the number of electrons is equal to the number of protons. Thus, in the neutral atom of \( M \):
- Number of electrons = Number of protons = 25

### Step 4: Determine the Number of Electrons in the \( M^{+2} \) Ion
Since \( M^{+2} \) indicates that the atom has lost 2 electrons, we can calculate the number of electrons in the ion:
- Number of electrons in \( M^{+2} \) = Number of electrons in neutral atom - 2
- Number of electrons in \( M^{+2} \) = 25 - 2 = 23

### Step 5: Determine the Number of Neutrons
The number of neutrons can be calculated using the formula:
\[ \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \]
Substituting the values:
- Number of neutrons = 52 - 25 = 27

### Final Summary
In the \( M^{+2} \) ion:
- Number of electrons = 23
- Number of protons = 25
- Number of neutrons = 27

Thus, the number of electrons, protons, and neutrons in \( M^{+2} \) ion are respectively **23, 25, and 27**.

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