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Chem3401_Wk1

QuestionAnswer
English system Common measurements of commerce including foot, pound and gallon
Metric system Measurements used in scientific work including gram, meter and liter.
Subatomic particles Very small particle that is a building block for atoms including electrons, protons and neutrons.
Periodic table A visual representation of the periodic law; arrangement of the elements in order of increasing atomic number such that the elements having similar chemical properties are positioned in vertical columns.
Electron behavior Electrons move about an atom’s nucleus in subspaces called shells, subshells and orbitals.
Classification of elements Elements can be classified into four categories; noble gases, representative elements, transition elements, and inner transition elements
Minerals Elements needed in small amounts that must be obtained through food.
Changes in matter Changes that can occur are grouped into two categories; physical change and chemical change.
Pure substances A pure substance can be classified as either an element or a compound on the basis of whether it can be broken down into simpler substances.
Elements in the body Four elements found in the human body are present at levels great than 5%; hydrogen, oxygen, carbon and nitrogen
Matter Anything that has mass and occupies space.
Physical states of matter Matter is a solid, liquid or gas based on its shape and volume.
Types of molecules Molecules can be separated into two categories
Created by: blaisemyers