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Chapter 2: Cemistry

Biology: Chemistry

Chemistry? Changes that occur in the structure of matter
Matter? Anything that occupies space and has mass
Mass? Quantity of matter/Constant volume
Weight? Influenced by gravity
Energy? Remains constant in the universe, only changes it shape and form, has three states of matter, is the ability to do work.
Solid? Definite shape, volume and a low state of energy.
Liquid? Fixed volume, the shape of the container it is in, and a medium state of energy.
Gas? Fills volume of container it is in, no shape,and a high state of energy.
Elements? Purest kind of matter and cannot be broken down further.
Element organized into? Periodic table
Elements grouped according to? Common characteristics.
Elements on table contain information? Atomic #, atomic mass, and name/symbol.
Symbol? Always capitalized if one letter, if two, first one is capitalized and second is lower case.
Atomic number? Whole number, number of protons and number of electrons.
Atomic mass? Number with decimal, number of neutrons and protons in the nucleus.
Atom? Simplest particle of an element.
Protons? Positive
Neutrons? No charge
Electrons? Negative
Isotope? Form of an element, different number of neutrons.
Atomic # equation? Atomic #= proton # and electron #
Atomic mass equation? # protons + # neutrons
Neutron equation? Atomic mass - atomic #
Electron levels? 2, 8, 8, 18, 18, 32, 32
Created by: Evelyn1997