WorksheetsContributions to modern atomic theory
Total questions: 10
Worksheet time: 6mins
An __________________ is the basic unit of a chemical element.
atom
molecule
electron
proton
atoms contain negatively charged (a) and positively charged protons, whereas neutrons have no charge.
Atoms are made up of three particles: protons, neutrons and ...
quarks
electrons
orbits
nucleous
The behavior of matter and light on the atomic and subatomic scale can be studied using quantum mechanics
TRUE
FALSE
Knowing how matter is structured can help us to determine how it’s going to behave in given conditions.
TRUE
FALSE
_______________ named the building blocks of matter atomos, meaning literally “indivisible,” about 430 BCE.
Dalton
Schrödinger
Democritus
Bohr
One of the postulates of the ____________'s atomic theory is that atoms cannot be created or destroyed.
Dalton
Schrödinger
Democritus
Bohr
Schrödinger's model describes the probability that an electron can be found in a region of space called ___________.
orbit
nucleus
orbital
atom
____________ incorporated the discovery of neutrons to Bohr atomic model
Rutherford
Chadwick
Dalton
Thomson
In the Bohr atomic model, electron orbits are associated with definite energies that are called energy levels or shells.
TRUE
FALSE
