Chemistry Elements
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How did John Dalton discover atomic weight? | By conducting the gas and diamond experiments.
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| Who discovered the nucleus and discovered it had a positive charge, by conducting the gold foil experiment? | Ernest Rutherford
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| Who discovered electrons, by conducting the cathode tube experiment? | J.J. Thomson
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| Who discovered that electrons have to be in a specific place? (the outer shells) | Niels Bohr
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| Who made the periodic table by organizing the elements by atomic mass? | Dmitri Mendeleev
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| Who modified the periodic table by rearranging the elements by atomic number? | Henry Moseley
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| What does Dalton's atomic theory state that we know now to be incorrect? | All atoms are NOT identical; atoms are not the smallest form of matter.
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| What is the definition of an atom? | The smallest particle of matter that retains all properties of a element.
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| The mass number is equal to ____ + ____ | protons neutrons
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| Which sub-atomic particles make up the nucleus of an atom? | Neutrons and protons
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| How many valence electrons do alkali metals have? | 1
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| What did John Dalton do? | Discovered Atomic Weight
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Created by:
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