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