Term
| What part of the atom contains the protons and neutrons? |
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Term
| What are the regions of an atom where electrons are found? |
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Term
| Who proposed the first widely accepted version of the atomic theory? |
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| Who proposed a model in which electrons can only be in certain energy levels? |
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Term
| What are the electrons in the outermost energy level called? |
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Term
| The atomic number tells the number of ___ in an atom. |
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| The number of protons equals the number of ___. |
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| The protons plus the neutrons is equal to the ___ number. |
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Term
| Atoms of the same element with different numbers of neutrons are called ___. |
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Term
| The weighted average of all the masses of all the naturally occurring isotopes of an element is the ___. |
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Definition
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Term
| The majority of the atoms in the periodic table are ___. |
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| ___ have properties of both metals and nonmetals. |
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Definition
| metalloids (semiconductors) |
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Term
| If I have 1 mole of marshmallows, how many marshmallows do I have? |
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Definition
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Term
| Explain why oxygen atoms (or any atom is neutral). What 2 particles are equal? |
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Definition
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Term
| Elements in the same horizontal row, or period, have the same number of valence electrons and similar chemical properties. |
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Definition
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Term
| What are the 3 subatomic particles |
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Definition
| protons, neutrons, electrons |
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Term
| What is the family name for Group 1 |
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Definition
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Term
| What is the family name for Group 18 |
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Definition
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Term
| What is the family name for Group 2 |
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Definition
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Term
| What is the family name for Groups 3-12 |
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Definition
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Term
| What is the family name for Group 16 |
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