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`atom
The smallest particle of an element that has the chemical properties of that element
element
a substance that cannot be broken down into a similar substance. It consists of 1 type of atom
molecule
a group of atoms that are held together chemically
The law conservation of matter `
matter can not be created or destroyed but simply change form
matter
anything that has mass and volume. Exists as a solid, liquid, or gas
proton
a positivly charged particle located in an atom's nucleus
neutron
a particle that has no charge and is located in an atom's nucleus
electron
a negatively charged located outside of an atom's nucleus
nucleus
the center of an atom where most of the atom's mass is found
mixture
a combination of two or more substances that do not combine, but remain as individual substaces
compound
a substance made up of two or more different types of atoms bonded together
solute
a substance that is dissolved to make a solution
solvent
a substance that dissolved to make a solution
solution
a type of mixture that is the same throughout
pH
a measurement of acidity
acid
a substance that can donate a proton another substance and has a pH below 7
base
a substance that can accept a proton from another substance and has a pH above 7
physical change
a process involving a substance's change from one state (gas, liquid, solid) to another without changing it's chemical composition
neutral
neither an acid or a base but has a pH level of exactly 7
chemical change
a process involving a substance's change from one state (gas, liquid, solid) which causes a change in a chemical composition
periodic table
a table of elements, arranged by an atomic number. that shows the patterns in their properties
group
elements in the same column;sorted by a similar chemical/physical properties
period
elements grouped in a row;shows a progression. usually going from metals to nonmetals
metal
an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat
nonmetal
an element that is nonmetal and is usually dull, hard to form,and is a poor conductor of electricity and heat
metalloid
an element that has properities of both metal and non metals
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