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Chemistry Exam 1

Particles that constitute the fundemental building blocks of matter. Atoms
Two or more joined atoms arranged specifically. Molecule
The science that seeks to understand the behavior of matter by studying atoms and molecules. Chemistry
Have a fixed volume and shape solid
A fixed volume that takes the shape of the container liquid
Expands to occupy volume, compressable. Gas
The kinds or amounts of substances that make up matter. Composition
Composed of 1 single type of atom or molecule Pure Substance
Substances that cannot be further broken down. Element
Substances that are composed of two or more elements. Compound
More than 1 atom or molecule type. Mixture
Mixtture where the composition varies from region to region. Heterogeneous Mixture
Mixture with the same component throughout Homogeneous
Alters the state or appearence Physical Change
The original sunstance transforms into something else. Chemical change
Property of a material that is displayed without changing the composition. Physical Property
Property that is displayed only by undergoing a phyical change. Chemical Property
How close a series of measurments are to each other. Precision
How close to the TRUE value measurments are. Accuracy
Has an equal probability of being to high and to low, if enough measurments are taken it will eventually even out. Random Error
Will consistently measure to high or to low. Systematic Error
How much matter makes up an object. mass
A tool used to convert one type of unit to another. Dimensinal Analysis
Fractional quantity with the units we are converting from what we are converting to. Conversion Factor
A characteristic that is dependent of the amount of the substance Intensive Property
Dependant on the amount Extensive property
In a chemical reaction, mass is neither created nor destroyed. -Antwoine Lauoisier Law of Conservation of Mass
Things will come together in whole number ratios. Law of Multiple Proportions.
Negatively charged, low mass particle. Electron
The number of protons in an element. Atomic Number (Z)
Unique 1 or 2 letter designated for each element. Chemical Symbol
Atoms with the same number of protons, but different number of electrons isotopes
The sum of the number of protons and neutrons an element has. Mass number (A)
Positively charged ion. Cation
Negatively Charged ion. Anion
When elements are arranged in order of mass, certain sets of properties recur. Periodic Law
Found in the lower and middle side of the periodic chart. Good conductors, shiney, ductile, malleable, lose electrons. Metals
Found on the upper right portion of the periodic chart. Poor conductors, gain electrons in chemical changes. Non-metals
Found between the metals and non-metals on the periodic chart. Semi-conductors. Metalloids
Alkali, lose 1 electron Group 1A
Alkaline earth metal, lose 2 electrons Group 2A
Starts with oxygen, Gain 2 electrons Group 6A
Halogens, Gain 1 electron Group 7A
Variable, conform with multiple chargs Transition Metals
E(fractional % of isotope)(mass of isotope) Atomic Mass Formula
Amount of material the contains avagadro's number of particles. The Mole
Avagadro's Number 6.0221 * 10^23
Created by: katdwatt