The mass of an electron is about`(1)/(1000)` times that of proton.

Explanation

To determine whether the statement "the mass of an electron is about 1/1000 times that of a proton" is correct, we can follow these steps:

### Step 1: Identify the Masses
- The mass of an electron (m_e) is approximately \( 9.1 \times 10^{-31} \) kg.
- The mass of a proton (m_p) is approximately \( 1.673 \times 10^{-27} \) kg.

### Step 2: Calculate the Ratio of the Masses
To find the ratio of the mass of an electron to the mass of a proton, we use the formula:
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