WorksheetsAtomic Theory and Structure
Total questions: 15
Worksheet time: 15mins
What is the sum of an atom's protons and neutrons called?
atom
atomic theory
atomic mass
atomic number
The _____ is based on the number of protons in the nucleus of the atom.
atomic structure
periodic table of the elements
atomic number
atomic mass
Which scientist developed the atomic theory?
JJ Thomson
Ernest Rutherford
John Dalton
James Chadwick
He developed the planetary model of the atom.
Rutherford
Bohr
Chadwick
Dalton
What did Thomson discover?
electron
proton
neutron
electron cloud
James Chadwick discovered the ________.
proton
neutron
electron
nucleus
He claimed that matter was made of small, hard particles that he called “atomos.”
Democritis
Dalton
Moseley
Einstein
Believed that atoms of the same element are identical to each other
Bohr
Rutherford
Dalton
Thomson
The best images of atoms look fuzzy because of their
small size
constant motion
fast-moving electrons
thunder and lightning
The atom's mass is determined by the number of
protons and neutrons
protons and electrons
neutrons and electrons
Who determined that atoms consist of mostly empty space?
Thomson
Rutherford
Bohr
Schrodinger and Heisenberg
Chadwick
Who proposed the Plum-Pudding model of the atom?
Thomson
Rutherford
Bohr
Schrodinger and Heisenberg
Chadwick
Which subatomic particle is responsible for the chemical properties of an element?
Proton
Neutron
Electron
Nucleus
What experiment led to the discovery of the nucleus in the atom?
Gold foil experiment
Oil drop experiment
Cathode ray experiment
Double-slit experiment
In the Bohr model of the atom, electrons orbit the nucleus in specific paths. What are these paths called?
Orbitals
Energy levels
Electron clouds
Valence shells
