Atomic structure
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12 Terms
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Who had the first idea of the existence of an atom and when?
^^john Dalton, 200 years ago^^
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**What particles are atoms made of?**
^^protons, neutrons and electrons^^
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What is within the nucleus and what orbits?
^^nucleus=protons and neutrons^^
^^orbit= electrons^^
^^orbit= electrons^^
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What are two properties of protons, neutrons and electrons that are especially important?
^^mass and electrical charge^^
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What is the number above a element?
^^mass number^^
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What is the number below a element?
^^atomic number^^
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How to count protons?
^^atomic Number from periodic table^^
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How to count neutrons?
^^mass Number minus the number of protons^^
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How to count electrons?
^^same as protons^^
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What is an isotope?
^^atoms of the same element always have the same number of protons, they may have different numbers of neutrons^^
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What are the properties of an isotope?
^^the isotopes of an element are identical in their chemical reactions.^^
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How small is an atom?
^^thickness of a crisp^^