An
element is a pure substance consisting of only one type of atom. Elements are
the fundamental building blocks of matter.
Each element has unique properties and is represented by a specific
chemical symbol
An alloy is a mixture of two or more elements, where at least one element is a metal. Common examples of alloys include brass (copper and zinc) and steel (iron and carbon)
A compound is a substance composed of two or more different elements chemically bonded together in fixed ratios. The elements in a compound lose their individual properties. Water (H₂O) and table salt (NaCl) are examples of compounds.
Sublimation is a process in which a substance changes directly from a solid to a gas without passing through the liquid phase.