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38 Cards in this Set
- Front
- Back
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Atom
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Smallest form of Matter that cannot be broken down by physical or chemical means (7) |
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Atomic Number |
Number of Protons in a given element. Same for all that elements atoms. |
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Balanced Equation |
An equation in which the number of atoms on both sides are balanced. In any chemical equation, matter can neither be created or destroyed. (13) |
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Celsius Temperature |
Has 0* as the melting point of water, and 100* as the boiling point.
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Chemical Bond
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An interaction between the electrons of joined atoms - there are several varieties (12) |
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Chemical Change
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The breakdown of a pure substance into one or more other pure substances
For example, Saline solution to NaCl and H2O to 2H + O |
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Chemical Formula
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The symbols written in a chemical equation (12) |
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Chemical Reaction
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An interaction between substances. (10) |
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Coefficient
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Tells you how many units of a reactant or product are involved in the reaction. (13) |
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Compound
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Any substance made up of atoms of two or more elements. (10) |
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Conversion Factor
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a fraction in which the numerator and the denominator are equal.
Equals 1 and is involved in dimensional analysis. (19) |
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Dimensional Analysis
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A system of conversion within the metric system and between the metric system and other systems for simplifying equations
(21) |
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Electron
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negatively charged particle outside the nucleus (9) |
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Electron Density
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a “smearing” of the average positions of electrons (10) |
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Element
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any substance composed of only one type of atom
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Family
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Column on the Periodic Table
(7) Same as a "group" |
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Group
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Column on the Periodic Table (7) Same as a "family" |
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Heterogenous Mixture
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These have boundaries where you can see where one component stops and another begins because the composition changes from one place to another in a sample. Think about the items in your medicine cabinet that require shaking before use. (16) |
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Homogenous Mixture |
Has a smooth texture that makes it impossible to see boundaries between the various component. Uniform in appearance. (16) |
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Hypothesis
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It is Zeus who is throwing the lightning bolts.
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Kelvin
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A temperature scale and the name of its units.
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Kelvin Temperature |
A temperature scale in which 0* is absolute zero., ie, without any motion. |
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Matter |
The stuff of which all physical material is made. Made up of Atoms. |
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Mixture |
Two or more Pure Substances combined together. The composition may vary from one part of the sample to another. Consequently, theratio of substances in one part of the sample can be very different from the ratio of substances in another part of the sample (15) |
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Model |
a design or structure used to clarify or organize information. A means for understanding nature. |
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Molecule |
When electrons are shared between atoms in a substance, this is how we refer to the smallest unit that makes up this substance . (12) |
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Neutron |
Particle in Nucleus of atom that carries no charge. |
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Nucleus |
Center of an Atom. Contains Protons & Neutrons (7) |
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Period |
Rows on the Periodic Table (7) |
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Periodic Table |
Arrangement of the Elements (7) |
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Physical Change |
alteration of a substance without change into another substance. |
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Product |
the substances present after a Chemical Reaction has been carried out (12) |
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Proton |
Positively charged particle in nucleus |
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Pure Substance |
Matter that has a definite composition. EpsomSalts |
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Reactant |
The starting materials in any chemical reaction (12) |
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Scientific Method |
the verifiable and reproducible approach to experimentation.
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Solution |
a smooth mixture in which it is impossible to see boundaries between the different components.
Also known as a Homogenous mixture. (15) |
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Theory |
Zeus is pissed. |
