What was the physical property used by mendleev in creating his periodic table.

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Which statement is best described as a atom

What is the molar mass of a gas that has density of 2.054 g/l