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Chemistry
science
| Question | Answer |
|---|---|
| Periodic Table | a chart of the elements showing the repeating pattern of their properties. |
| Atomic mass | the average mass of one atom of an element. |
| Nucleus | the central core of an atom containing protons and usually neutrons. |
| Protons | a small, positively charged particle in the nucleus of the atom. |
| Neutrons | a small particle in the nucleus of the atom, with no electrical charge. |
| Electrons | a tiny, negatively charged particle that moves around the nucleus of an atom. |
| Atomic number | This number indicates the number of protons in a atom |
| Lewis Dot Structure | a model of the atom which shows the valence electrons surrounding the element’s chemical symbol. |
| Valence electrons | the electrons in the outermost electron level or orbital (highest energy level) of the electron |
| Period | a horizontal row of elements in the periodic table. |
| family/group | elements in the same vertical column of the periodic table. |
| Metalloid | an element that has some of the characteristics of metals and some of the characteristics of nonmetals. |
| Malleable | a term used to describe a material that can be hammered or rolled into shape. |
| Ductile | a term used to describe a material that can be pulled out into a long wire. |
| Alkali metals | an element in group 1 of the periodic table. So reactive that they never are found uncombined in nature. soft and shiny and have one valence electrons. |
| Alkaline earth metals | an element in group 2 of the periodic table. |
| Transition metals | an element in groups 3 through 12 of the periodic table |
| Element | a pure substance that cannot be broken down. (atoms make up elements) |
| Compound | 2 or more elements chemically combine.. |
| Positive | Having a deficiency of electrons; having a higher electric potential |
| Negative | Having a surplus of electrons; having a lower electric potential |
| Neutral | Not helping or supporting either of two opposing sides. |
| 2 | First row |
| 8 | Second row |
| 18 | Third row |
| 32 | Fourth row |
Created by:
abby101
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