Question

question 3 1 pts is widely credited with creating the first periodic table of the elements based on their common chemical properties. albert einstein john dalton dimitri mendeleev charles darwin question 4 1 pts the periodic relationship involves the _, or number of protons for each given element. isotopic ratio molar mass atomic mass atomic number

Explanation:

For Question 3, Dimitri Mendeleev is known for creating the first periodic table based on elements' chemical properties. Albert Einstein is famous for theories in physics, John Dalton for atomic theory in general, and Charles Darwin for the theory of evolution.
For Question 4, the atomic number represents the number of protons in an element, which is key to the periodic relationship. Isotopic ratio is about different isotopes of an element, molar mass is the mass of one mole of a substance, and atomic mass is the average mass of an element's isotopes.

Answer:

Question 3: C. Dimitri Mendeleev
Question 4: D. atomic number