Question

Right or wrong sentence.

While designing the periodic table, Mendeleev considered the chemical and physical properties of the elements.

Options

• Right

• Wrong

Answer 1

The given sentence is right.

Explanation:

Dmitri Mendeleev arranged the known elements by atomic mass and organised them according to recurring chemical and physical properties (he used data like molecular formulae of hydrides/oxides, melting and boiling points, densities, etc.). He also left gaps and predicted properties for undiscovered elements, which supports that he was explicitly using element properties when designing the table.