The atom
subatomic particle with a positive charge
proton
a substance made of only one type of atom
element
the name given to the vertical columns on the periodic table
groups
the states of matter
solids, liquids, and gases
the reactants
subatomic particle with a negative charge
electron
a substance made of two or more elements
compound
the name of the horizontal rows on the periodic table
periods
a reaction where there is no change in the molecules or compounds
physical change
a chemical reaction where two or more substances combines to form a single product
synthesis reaction
subatomic particle that is not positive or negative
neutron
mixture
the subatomic particle that determines an element's atomic number
protons or electrons
a change that is usually irreversible
chemical change
a chemical reaction where one thing breaks down into multiple things
decomposition reaction
the location of protons and neutrons in an atom
nucleus
a substance made of two or more atoms
molecule
the number of elements in the periodic table
118
a change in colour is a sign of
chemical change has occured
a chemical reaction where one element or ion moves out of one compound to another
single displacement reaction
the amount of protons in a neutral atom with 9 electrons
9
an element that has gained or lost an electron and now has an electric charge
ion
the person that designed the periodic table
Dmitri Mendeleev
chemical change
Hydrogen + Chlorine → Hydrochloric acid
synthesis reaction