Concept14 - Concept 2.2 An elements properties depend on...

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Concept 2.2 An element’s properties depend on the structure of its atoms Each element consists of unique atoms. An  atom  is the smallest unit of matter that still retains the properties of an element. Atoms are composed of even smaller parts, called subatomic particles. Two of these, neutrons and protons, are packed together to form a dense core, the atomic  nucleus, at the center of an atom. Electrons can be visualized as forming a cloud of negative charge around the nucleus. Each electron has one unit of negative charge. Each proton has one unit of positive charge. Neutrons are electrically neutral. The attractions between the positive charges in the nucleus and the negative charges of the  electrons keep the electrons in the vicinity of the nucleus. A neutron and a proton are almost identical in mass, about 1.7 × 10 −24  gram per particle. For convenience, a smaller unit of measure, the  dalton,  is used to measure the mass of  subatomic particles, atoms, or molecules.
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Concept14 - Concept 2.2 An elements properties depend on...

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