Account for the following limit your answer to two sentence Atomic weight of most of the elements are fraction ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Isotopes**: Most elements exist in nature as a mixture of isotopes, which are atoms of the same element that have the same atomic number but different atomic masses.

2. **Calculating Atomic Weight**: The atomic weight of an element is calculated as the weighted average of the atomic masses of its isotopes, taking into account their relative abundances in nature.

3. **Conclusion**: This averaging process results in atomic weights that are often fractional, as they reflect the presence of different isotopes rather than a single, whole number mass.

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