A : Magnesium do not impart flame colourtion.
R : The `e^(-)` in magnesium are too strongly bound to get excited by flame.

Options

A. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (1).
B. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false. Them mark (3).
D. If both Assertion and reason are false statement, then mark (4).

Answer

To solve the question, we need to analyze the assertion and reason provided:

### Step 1: Understand the Assertion
The assertion states that "Magnesium does not impart flame coloration." This means that when magnesium is heated in a flame, it does not produce a characteristic color like some other metals do.

**Hint:** Think about how different metals behave when heated in a flame and whether they produce colors.

### Step 2: Understand the Reason
The reason given is "The electrons in magnesium are too strongly bound to get excited by the flame." This implies that the electrons in magnesium require a significant amount of energy to move to a higher energy level, which is not provided by the flame.

**Hint:** Consider the relationship between the energy required for electron excitation and the size of the atom.

### Step 3: Analyze the Properties of Magnesium
Magnesium has an atomic number of 12, and its electron configuration is 1s² 2s² 2p⁶ 3s². The valence electrons (the 3s electrons) are relatively close to the nucleus due to the small size of magnesium. This small size means that these electrons are held tightly by the nucleus.

**Hint:** Recall how atomic size affects the energy levels of electrons and their ability to be excited.

### Step 4: Energy Requirement for Excitation
For an electron to be excited to a higher energy level, it must absorb energy. In the case of magnesium, the energy provided by a Bunsen flame is insufficient to excite the tightly bound valence electrons.

**Hint:** Think about the energy levels and how they relate to the energy provided by the flame.

### Step 5: Conclusion
Since the assertion is true (magnesium does not impart flame coloration) and the reason is also true (the electrons are too strongly bound to get excited), and the reason correctly explains the assertion, we conclude that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer:** Both assertion and reason are true, and the reason is the correct explanation of the assertion.

### Options:
- Option A: Both assertion and reason are true, and the reason is the correct explanation.
- Option B: Reason is not the correct explanation.
- Option C: Assertion is true, reason is false.
- Option D: Both assertion and reason are false.

The correct option is **Option A**.