Deuterium is different from hydrogen in which property

Options

A. Reacts more than hydrogen
B. Reacts less than hydrogen
C. It emits beta particles
D. Its reactivity is same as that of hydrogen

Answer

To solve the question regarding how deuterium differs from hydrogen in terms of properties, we can follow these steps:

### Step 1: Understand the Isotopes
Deuterium is an isotope of hydrogen. Hydrogen has three isotopes:
- Protium (¹H) with no neutrons
- Deuterium (²H) with one neutron
- Tritium (³H) with two neutrons

### Step 2: Compare Properties
The main difference between deuterium and hydrogen lies in their atomic mass and nuclear composition. Deuterium has a greater mass due to the presence of an additional neutron.

### Step 3: Analyze Reactivity
- **Reactivity**: Generally, isotopes of an element have similar chemical properties because they have the same number of electrons. However, the presence of an extra neutron in deuterium affects its physical properties, such as bond strength and reaction rates.
- Deuterium tends to react slower than hydrogen in many chemical reactions due to the kinetic isotope effect. This means that the bonds involving deuterium are stronger and require more energy to break compared to those involving hydrogen.

### Step 4: Evaluate the Options
Now, let's evaluate the given options:
A. Reacts more than Hydrogen - **Incorrect**
B. Reacts less than Hydrogen - **Correct**
C. It emits beta particle - **Incorrect**
D. Its reactivity is the same as that of Hydrogen - **Incorrect**

### Conclusion
The correct answer is **B. Reacts less than Hydrogen**.

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