Periodicity Quotes
- Childhood is a complex dialectical process characterized by periodicity, unevenness in the development of different functions, metamorphosis or qualitative transformation of one form into another,… — Lev S. Vygotsky
- The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties. — Dmitri Mendeleev
- If all the elements are arranged in the order of their atomic weights, a periodic repetition of properties is obtained. This is expressed by the… — Dmitri Mendeleev