Vocabulary #2 Element and Atoms

element:a substance that cannot be broken down any futher into anything simpler.
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atom:the smallest particle of an element that has the same chemical properties as the element.
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nucleus:an atom dense center, where most of its mass is.
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electron:a negatively charged particle that moves around an atoms nucleus.
proton:a positively charged particle inside an atoms nucleus.
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neutron:a particle wirh no charge inside an atoms nucleus.
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atomic number:the number of protons in an atom.
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metal:any of a group of elements that conduct heat and electricity,is shiny and bendable.
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