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Chemistry Exam 1

Chemistry The study of the structure and properties of various materials.
Scientific Method A logical approach to the solution of a problem.
Qualitative A description without a measurement.
Quantitative A description with a measurement.
Weight The force with which an object is pulled toward the earth.
Mass The measure of the amount of matter in an object.
Temperature The average kinetic energy of the particles in a material.
Accuracy The nearness of a measurement to its accepted value.
Precision The agreement between measurements made in the same manner.
Matter Anything that has mass, takes up space, and exhibits inertia.
Phase A physically separate material with a unique set of properties.
Mixture A combination of 2 or more materials each retaining their own properties.
Colloid A heterogeneous mixture in which the particles do not settle upon standing.
Suspension A heterogeneous mixture in which the particles settle upon standing.
Solution A homogeneous mixture.
Substance Matter with a constant composition throughout.
Compound A combination of 2 or more atoms in a definite ratio.
Element A homogeneous substance that consists of 1 type of atom.
Property A characteristic of matter.
Density The mass of a substance per unit volume.
Heat Thermal energy that is transferred due to a difference in temperature.
Activation Energy The energy required to start a chemical reaction.
Atom The smallest part of an element that still has the properties of that element.
Anode The positive electrode.
Cathode The negative electrode.
Isotope An atom of the same element with a different mass number (number of neutrons).
Atomic Number The number of protons in an atom.
Mass Number The sum of the number of protons and neutrons in an atom.
Radioactivity Occurs when rays are being produced spontaneously by an unstable atomic nucleus.
Spectroscopy The study of the interaction between matter and radiant energy.
Frequency The number of waves that pass a given point each second.
Wavelength The linear distance between corresponding points on consecutive waves or the distance from crest to crest.
Heisenberg Uncertainty Principle It is impossible to know the exact location and momentum of a particle at the same time.
Created by: ajgaz98



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