Two student X and Y report the mass of the same substance as `7.0 g` and `7.00 g` respectively. Which of the following statement is correct?

Options

A. Both are equally accurate
B. X is more accurate than Y
C. Y is more accurate than X
D. Both are inaccurate scientifically

Explanation

To determine which student's measurement is more accurate, we need to analyze the reported values and their implications regarding precision and accuracy.

### Step-by-Step Solution:

1. **Understanding the Measurements**:
- Student X reports the mass as **7.0 g**.
- Student Y reports the mass as **7.00 g**.

2. **Identifying Significant Figures**:
- The measurement **7.0 g** has **two significant figures**.
- The measurement **7.00 g** has **three significant figures**.

3. **Understanding Precision**:
- Precision refers to the degree of reproducibility or consistency of a measurement.
- A measurement with more significant figures indicates a higher precision. In this case, since Y's measurement has more significant figures, it is more precise.

4. **Understanding Accuracy**:
- Accuracy refers to how close a measurement is to the true value.
- While both measurements could be accurate, the one with higher precision (more significant figures) is generally considered to be more reliable.

5. **Conclusion**:
- Since Student Y's measurement (7.00 g) is more precise than Student X's measurement (7.0 g), we conclude that **Y is more accurate than X**.

### Final Answer:
- The correct statement is: **Y is more accurate than X**.