Atoms - 6 , but not O 2 ). The atoms of the elements...

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Atoms, Molecules, Ions, and Bonds Matter is anything that takes up space and has mass. Matter consists of elements that possess  unique physical and chemical properties. Elements are represented by chemical symbols of one or  two letters, such as C (carbon), Ca (calcium), H (hydrogen), O (oxygen), N (nitrogen), and P  (phosphorus). The smallest quantity of an element that still possesses the characteristics of that  element is an  atom.  Atoms chemically bond together to form  molecules,  and the composition of a  molecule is given by its chemical formula (O 2 , H 2 O, C 6 H 12 O 6 ). When the atoms in a molecule are  different, the molecule is a  compound  (H 2 O and C 6 H 12 O
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Unformatted text preview: 6 , but not O 2 ). The atoms of the elements consist of a nucleus containing positively charged protons and neutrally charged neutrons. Negatively charged electrons are arranged outside the nucleus. The atoms of each element differ by their number of protons, neutrons, and electrons. For example, hydrogen has one proton, one electron, and no neutrons, while carbon has six protons, six neutrons, and six electrons. The number and arrangement of electrons of an atom determine the kinds of chemical bonds that it forms and how it reacts with other atoms to form molecules. There are three kinds of chemical bonds:...
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