How did Mendeleev come up with the first periodic table of the elements?(1 point)
Responses
He arranged the elements by different properties to find a pattern.
He arranged the elements by different properties to find a pattern.
He estimated the number of electrons in atoms of each element.
He estimated the number of electrons in atoms of each element.
He determined the mass of atoms of each element.
He determined the mass of atoms of each element.
He organized the elements by their atomic number.