Question

the modern periodic table has been evolved through the early attempts of dobereiner, Newlands and Mendeleev. list one limitations of three attempts​

Answer 1

Answer:

Explanation:

dobereiner:

1. disordered collection: not holding true for all

2. properties of elements in triads were not similar

newland's:

1. odd grouping

2. didnt leave spaces for undisocvered elements

3. showed meaning with light metals and not heavy metals

mendeleev:

1. position of rare earth and actinides was not justified

2. positon of isotopes was not given

3. some elements with higher atomic weights were placed before elements with lower atomic weights