You strongly heat a tan-colored powdery solid directly on a hot plate in a vacuum chamber (so no air can interfere with the experiment). You get a black powder remaining on the plate, an orange liquid dripping off the plate, and white vapor fumes rising off the plate. Was the substance you started with most likely a pure element, a pure compound, or a mixture? How do you know?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
You strongly heat a tan-colored powdery solid directly on a hot plate in a vacuum chamber (so no air can interfere with the experiment). You get a black powder remaining on the plate, an orange liquid dripping off the plate, and white vapor fumes rising off the plate. Was the substance you started with most likely a pure element, a pure compound, or a mixture? How do you know?
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