Chapter PSS, Problem 42E

Interpretation Introduction

Interpretation:

The given number of helium atoms in $\text{1}\text{milliliter}$ of helium gas at standard temperature and pressure is to be expressed in scientific notation.

Concept introduction:

The ordinary numbers are written as the power of $10$ in the scientific terms. The power of $10$ denotes the position of decimal point in a number. The number as the positive power of $10$ shows that the decimal point is present on the right side of the whole number digits. On the other hand, the negative power shows that the decimal point is present on the left side of the whole number digits.

In scientific notation, the non-zero significant numbers are written along with the power of $10$ which denotes the position of decimal point.