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Chemistry · Some Basic Concepts of Chemistry

हिन्दी

The mass of a single hydrogen atom is \( 0.00000000000000000000000166\text{ g} \). In proper scientific notation \( N \times 10^n \), this value is correctly written as:

  1. \( 16.6 \times 10^{-25}\text{ g} \)
  2. \( 1.66 \times 10^{-27}\text{ g} \)
  3. \( 0.166 \times 10^{-23}\text{ g} \)
  4. \( 1.66 \times 10^{-24}\text{ g} \)

Correct answer · Option 4

\( 1.66 \times 10^{-24}\text{ g} \)

Explanation

In scientific notation, the decimal is moved 24 places to the right to place one non-zero digit before the decimal point: \( 1.66 \times 10^{-24}\text{ g} \).
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