Word Bank: Element Electron, Dmitri Mendeleev, John Dalton, Proton 1.)
was the first to propose that all elements and matter are made up of small "indivisible
particles" called atoms.
2.) Atoms are the smallest particles that can still be considered an
3.) in an atom, the positively charged subatomic particle is called the
and the negatively
charged subatomic particle is called the
4.) The first Periodic Table was created by
in 1869