In a chain reaction uranium atom gets fissioned forming two different material. The total weight of these put together is

Options

A. More than the weight of parent uranium atom
B. Less than the weight of parent uranium atoms
C. More of less depends upon experimental conditions
D. Neither more nor less

Answer

To solve the question regarding the total weight of the materials formed after the fission of a uranium atom, we can follow these steps:

### Step 1: Understand the Process of Nuclear Fission
Nuclear fission is the process where a heavy nucleus, such as uranium, splits into two or more lighter nuclei (daughter nuclei) along with the release of energy.

**Hint:** Remember that fission involves a heavy nucleus breaking into lighter nuclei.

### Step 2: Identify the Masses Involved
Let’s denote:
- The mass of the uranium atom before fission as \( m_u \).
- The masses of the daughter nuclei formed after fission as \( m_1 \) and \( m_2 \).

**Hint:** Assign variables to the masses to keep track of them easily.

### Step 3: Apply the Concept of Mass Defect
In nuclear fission, the total mass of the daughter nuclei (\( m_1 + m_2 \)) is always less than the mass of the parent uranium atom (\( m_u \)). This is due to the conversion of some mass into energy, as described by Einstein’s equation \( E = mc^2 \).

**Hint:** Recall that mass can be converted into energy, leading to a mass defect.

### Step 4: Establish the Relationship
From the above understanding, we can establish the relationship:
\[ m_1 + m_2 < m_u \]
This indicates that the total weight of the daughter nuclei is less than that of the original uranium atom.

**Hint:** Focus on the inequality that shows the relationship between the parent and daughter masses.

### Step 5: Conclusion
Thus, the total weight of the materials formed after the fission of a uranium atom is less than the weight of the parent uranium atom.

**Final Answer:** The total weight of the daughter nuclei is less than the weight of the parent uranium atom.

**Hint:** Always remember that in nuclear reactions, mass is not conserved in the traditional sense due to energy release.