Why has the atomic theory changed over time?

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car