Match the scientist to their contributions to the understanding of the atom.
1.
the universe is made of tiny particles
2.
discovered positively charged particles
3.
atoms are the smallest unit of matter
4.
wrote an atomic theory with four points
5.
calculated the mass of the electron
6.
demonstrated negative charged electrons with cathode ray tubes
7.
electricity and lightning are currents of particles
8.
wrote the planetary model of the atom
9.
refined knowledge about sub-atomic charges
10.
demonstrated that atoms are mostly empty space
11.
atoms are surrounded with negative charge
12.
discovered that atoms can break apart
a.
Chadwick
b.
Maxwell
c.
Democritus
d.
Curie
e.
Bohr
f.
Millikan
g.
Dalton
h.
Thomson
i.
Moseley
j.
Franklin
k.
Rutherford
l.
Newton
