2. how did mendeleev organize his periodic table?\ngroups and periods\nprotons and electrons\nhydrogen and…

2. how did mendeleev organize his periodic table?\ngroups and periods\nprotons and electrons\nhydrogen and helium\nelements and compounds

2. how did mendeleev organize his periodic table?\ngroups and periods\nprotons and electrons\nhydrogen and helium\nelements and compounds

Answer

Brief Explanations:

Mendeleev organized the periodic table into groups (vertical columns) and periods (horizontal rows) based on the periodic law, which states that the properties of elements are a periodic function of their atomic weights.

Answer:

Groups and Periods