All matter consists of chemical substances. A chemical substance has a definite composition and the same composition throughout. A chemical substance may be either an element or a compound. An element is a pure substance that cannot be broken down into other types of substances.
Elements are the simplest complete chemical substances. ... Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated back into their original components.
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
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All matter consists of chemical substances. A chemical substance has a definite composition and the same composition throughout. A chemical substance may be either an element or a compound. An element is a pure substance that cannot be broken down into other types of substances.
Elements are the simplest complete chemical substances. ... Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated back into their original components.
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.