Elements and Compounds, Ch- 3, Chemistry, ICSE,Class-8, Part -1 , SOUVENIR

Описание: In chemistry, an element is a pure substance that cannot be broken down into simpler substances by chemical reactions. It consists of atoms that all have the same number of protons in their nucleus, which is also known as the atomic number. Elements are the fundamental building blocks of matter.

A compound is a substance formed when two or more different elements are chemically bonded together in a fixed ratio. These elements are held together by chemical bonds, which can be ionic or covalent. Compounds have properties distinct from the elements that make them up.