What were the limitations of Newlands’ Law of Octaves?

Explanation

**Step-by-Step Solution:**

1. **Understanding Newlands’ Law of Octaves:**
- Newlands’ Law of Octaves is a classification of elements based on their atomic masses. It states that when elements are arranged in order of increasing atomic mass, every eighth element has similar properties to the first element in the sequence.

2. **Limitation 1 - Applicability:**
- The law was only applicable to the first 20 elements of the periodic table, which means it could only effectively classify elements up to calcium (atomic number 20). Beyond this, the pattern of similar properties did not hold true.

...