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Unformatted text preview: Matter For chemists, the most elemental building block of matter is the atom . While it is certainly true that the atom can be divided into even more elemental building blocks, it is at the level of the atom that the first distinctive "chemical" properties start appearing. There are many different types of atoms, as you can see in the periodic table of the elements, each with their own distinctive chemical properties. From these atoms molecules can be assembled. Molecules are groups of atoms held together by forces called chemical bonds. States of Matter Chemists classify matter into three different states : • SOLID - has a definite volume, a definite shape, and is rigid. • LIQUID - has a definite volume but no definite shape. • GAS - has no distinct volume, no distinct shape and can be easily compressed to occupy a smaller volume. Mixtures A substance containing only one type of atom or one type of molecule is a pure substance. Most of the matter A substance containing only one type of atom or one type of molecule is a pure substance....
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This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.
- Fall '10