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| The atomic number identifies the number of ________ in the nucleus of an atom. |
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| An ________ is an atom that has gained or lost electrons. |
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| the subatomic particle with a negative charge. |
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| the subatomic particle with a positive charge. |
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| The smallest unit of a chemical coumpound. |
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| The basic materials that makeup our world and the smallest unit of matter |
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| The subatomic particle located in the nucleus of the atom that has no electrical chargeneutron |
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Definition
| Equals the total number of protons and neutrons in the nucleus of the atom |
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| The center of the atom that contains protons and neutrons |
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| Part of the atom where the electrons are most likely to be found |
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Definition
| Elements in the same ___________ will have similar chemical and physical properties |
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Definition
| Elements in the same _________ will have the same number of energy levels or shells. |
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| Elements that are shiny, malleable, ductile, and good conductors. |
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| If an element can be hammered into thin sheets and molded, it is said to be ________. |
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Definition
| If an element can be pulled into thin wires it is said to be |
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Definition
| A metal reflects light and is shiny. This describes the physical property of ___________. |
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Term
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Definition
| The outermost electrons are called _________________ electrons. |
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Definition
| Early scientist who used the cathode ray experiment to identify the electrons in an atom. |
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Definition
| Scientist who said that atoms where indivisble and could not be divided. |
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| Scientist who utilized the gold foil experiment to identify the positive nucleus. |
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| An atom of the same element that has a different number of neutrons in the nucleus |
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| The family name of the Group 1 or IA elements. |
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Definition
| Family on the periodic table with two valence electrons |
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| Only family on the periodic table that has outer energy levels that are full. |
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Term
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Definition
| The attraction between the positive nucleus and negative electrons create the ___________ that hold the atom together. |
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Term
| Halogens, Group 17 or VIIA |
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Definition
| The elements in this family will gain one electron to complete their outer electron shell. |
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Term
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Definition
| An atom that has gained an electron will have an overall _____ charge |
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Definition
| Scientist who arranged the first periodic table according to increasing atomic mass. |
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Definition
| Scientist who arranged the periodic table according to increasing atomic number. |
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Term
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Definition
| Identifies the number of electrons and atom will gain or lose to complete its outer shell. |
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| A group of atoms that act as one single atom when they chemically bond. |
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Definition
| The group 14 or IVA elements are known as the _____________ family. |
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| Family of elements that lose 3 electrons when they chemically bond |
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Definition
| The smallest part of a chemical compound is a _________. |
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Definition
| ___________ is anything that has mass and takes up space. |
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Definition
| Measure of the amount of matter in an object |
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| Measures the amount of space an object occupies |
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Definition
| Elements that have properties of both metals and non-metals |
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Definition
| physical property of matter that describes the amount of matter that occupies a given amount of space. |
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Definition
| the length of time it takes a radioactive substance to undergo radioactive decay |
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Definition
| Elements in the same _______ will have the same number of valence electrons. |
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Term
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Definition
| Metals tend to _______ valence electrons. |
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