NEW
Font size
WorksheetsHistory of the atom
Total questions: 20
Worksheet time: 1hrs 24mins
Which scientist discovered the electrons?
Dalton
Thomson
Atristotle
Bohr
Bohr discovered that electrons are located in
the nucleus
inside protons
electron cloud
circular orbits around the nucleus
What is a particle with one negative charge called?
electron
proton
quark
neutron
What is a particle with one positive charge called?
proton
electron
neutron
quark
What is the center of an atom called?
nucleus
electron cloud
proton center
photon center
Who was the Greek philosopher who called the smallest particle of matter an "atom"?
Democritus
Aristotle
J.J Thompson
Einstein
Which of the following is/are conclusions based on Rutherford’s gold foil experiment?
Atom is mostly empty space
The nucleus is positively charged
The atom has a small dense nucleus
All answers are correct
Which of the following is NOT a part of Dalton's atomic theory?
All elements are composed of atoms.
Atoms are always in motion.
Atoms of the same element are always identical.
Atoms that combine do so in simple, whole-number ratios.
atoms cannot be created, destroyed, or divided
Democritus was known for
discovering the electron
discovering the proton
creating the term atom, meaning indivisible
discovering the nucleus
Place the following atomic models in order, from earliest to latest:
A) Rutherford B) Thomson C) Dalton
B, C, A
C, A, B
A, C, B
C, B, A
