Term
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Definition
| pure chemical substance consisting of a single type of atom distinguished by its atomic number (which is the number of protons) |
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Term
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Definition
| smallest unit of an element that is still the element |
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Term
| What are the parts of an atom? |
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Definition
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Term
| Where do the protons reside within an atom? |
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Definition
| In the nucleus with the neutrons at the center. |
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Term
| Where do the electrons reside in an atom? |
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Definition
| Moving around the nucleus in orbitals |
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Term
| What is the charge of a proton? |
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Definition
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Term
| What is the charge of an electron? |
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Definition
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Term
| What is the charge of a neutron? |
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Definition
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Term
| Which parts of the atom contribute to its atomic weight. |
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Definition
| Protons and neutrons. Electrons have no measurable mass or weight. |
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Term
| What aspect of an atom defines it as being a specific element? |
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Definition
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Term
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Definition
| Contains the same number of protons and electrons - the positive and negative charges balance. |
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Term
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Definition
| An atom whose electron quantity does not match its proton quantity. |
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Term
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Definition
| An atom with an negative charge (more electrons than protons) |
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Term
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Definition
| An atom with a positive charge (more protons than electrons) |
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Term
| What is the center of an atom called and what resides there? |
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Definition
| Nucleus - the protons and neutrons reside at the nucleus. |
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Term
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Definition
| Atoms of the various elements can have varying numbers of neutrons. They do not all have the same number of neutrons as protons. Each "version" of the atom based on the the number of neutrons is called an isotope. |
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Term
| Why isn't Atomic Weight equal to 2X the number of protons? |
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Definition
| Because the atomic weight is based on the average weight of all of an elements atoms (all the isotopes), not just the ones where the neutrons equal the protons. |
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Term
| What is another way of describing orbitals? |
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Definition
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Term
| What is a general approximation of an element's atomic weight? |
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Definition
| 2.0 to 2.4 times the atomic number. |
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