Overview: Substances that exist in gaseous form follow the properties of that state of matter. Although the random motion of individual atoms and molecules is unpredictable, other properties are not. …
read moreOverview: The solid state of matter is one of the three states of matter, along with liquids and solids. In the solid state of matter, particles are in fixed positions,…
read moreOverview: The liquid state is one of the three states of matter, between the gaseous state and the solid state. Molecules still move freely, although the density is higher than…
read moreOverview: As one of the three states of matter, gases have chemical and physical properties of their own. The particles that make up gases are the most diffuse and…
read moreOverview: Chemical reactions change one or more types of substances into completely different substances with different physical and chemical properties from the components that existed before the reaction. For example,…
read moreOverview: The earliest models of atomic structure were concerned only with the way substances behaved in chemical reactions. Atoms were thought to be the smallest particles of elements, but they…
read moreOverview: Acids, bases, and salts are chemical compounds that are defined by their properties and chemical reactions with one another. Their strength is measured with indicators, such as litmus paper.…
read moreOverview In the earlier discussion of atomic theory as it relates to chemistry, protons and neutrons were described as being within the nuclei of atoms. Electrons were in orbit around…
read moreOverview: Solutions are special types of mixtures that are homogeneous. The particles in those mixtures are not chemically combined, so they can be separated by physical processes such as evaporation. …
read moreOverview: Matter is anything that has mass and occupies space, whether it is visible or not. It exists in three separate states, solid, liquid, and gas. Each state has its…
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