Term
| What is a familiar idea used to explain unfamiliar facts and observed in nature? |
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| What is a an explination of observable facts and phenomena? |
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| What is proposed the existance of an atom? |
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| What was rejected the idea of an atom? |
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| Who was credited with discovery of the electron? |
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| What are particles in the nucleus of the atom? |
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| What is a number of protons in the nucleus of an atom? |
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| What is a number of protons (+)=# of electrons (-) |
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| What are atoms of an element that have different numbers of neutrons? |
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| What is a total number of protons and neutrons in an atom? |
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| What is an average of the masses of all the element's isotopes? |
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Term
| Who was an English schoolmaster who explained who explained "The Law of Conservation of Mass." |
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Term
| What must models and theorys do? |
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Definition
1. Explain all known facts
2. Enable scientist to make correct predictions |
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Term
| What is comprised by protons and neutrons in an atom? |
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| Atoms are what because the number of poitively charged protons equals the number of negitively charged electrons? |
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