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27 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Chemistry |
The study of matter and the changes that matter undergoes. |
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Matter |
Anything that has mass and occupies space. |
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Mass |
One of the ways that scientists measure the amount of matter. |
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The scientific method |
A systematic approach to experimentation. |
*Observations *Hypothesis *Experiment *Model(Theory) *Further Experiment |
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Law |
A concise verbal or mathematical statement of a reliable relationship between phenomena. |
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Hypothesis |
A tentative explanation for a set of observations. |
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Theory |
A unifying principle that explains a body of experimental observations and the laws that are based on them. |
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Model |
Theory used to explain a collection of scientific evidence. |
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Atom |
The basic unit of an element that can enter into chemical combination. |
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Element |
A substance that cannot be separated into simpler substances by chemical means. |
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Electron |
A negatively charged subatomic particle found outside the nucleus of all atoms. |
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Alpha Particle |
A helium ion with a positive charge of +2. |
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Nucleus |
The central core of the atom that contains the protons and neutrons. |
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Proton |
A positively charged particle in the nucleus of an atom. |
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Atomic Number (Z) |
The number of protons in the nucleus of each atom of an element. |
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Periodic Table |
A chart in which elements having similar chemical and physical properties are grouped together. |
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Group |
The elements in a vertical column of the periodic table. |
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Period |
A horizontal row of the periodic table. |
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Alkali Metal |
An element from Group 1A, with the exception of H (i.e. Li,Na,K,Rb,Cs,& Fr) |
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Alkaline Earth Metal |
An element from Group 2A (Be, Mg, Ca, Sr, Ba,& Ra) |
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Chalcogens |
Elements in group 6A (O, S, Se, Te, & Po) |
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Halogens |
The elements in Group 7A (F, Cl, Br, I, and At) |
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Nobel Gases |
Elements in Group 8A (He, Ne, Ar, Kr, Xe, & Rn) |
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Metal |
Element with a tendency to lose electrons, located left of the zigzag line on the periodic table. |
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Nonmetal |
Element with a tendency to gain electrons, located in the upper right portion of the periodic table. |
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Metalloid |
Elements with properties intermediate between metals and minerals. |
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Isotope |
Atoms that have the same atomic number (Z) but different mass numbers (A). |
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