Which basic concept was used by Mendeleef for organishing the elements ?

Which element was named as eka-silicon in Mendeleef classification of elements ?

Basic Concept OF Reactions

What is the basic concept in Priestly's experiment?

The nuclei of elements X,Y and Z have same number of protons, but different nembers of neutrons. According to Mendeleef periodic table, the elements X,Y and Z

Which of the following concepts is the basic element of conditioned Response?

Which among the basic way for developing understanding of the concept of EVS?

What is the basic concept of transformation experiment of Griffith:-

Acidity and Basicity Concepts