Questions and answers
Atomic theory
All questions and answers from this set. This quiz covers the atomic theory as well as history of atomic theory development.
Questions: 15
Played: 1075 times
Question 1
Positively charged particle of an atom is:
proton
Question 2
Center of an atom is called:
nucleus
Question 3
Particle with no electrical charge of an atom is:
neutron
Question 4
Negatively charged particle of an atom is:
electron
proton
neutron
Question 5
Match term with definition
Cation
an ion with a positive charge
Anion
an ion with a negative charge
Question 6
The nuclear model of the atom held that:
the atom had a dense, positively charged nucleus.
Question 7
What is the name of the researcher who isolated the neutron in 1932?
James Chadwick
Question 8
Which scientist isolated the proton from the nucleus in 1919?
Ernest Rutherford
Question 9
Which of the following is the philosopher credited with coining the term "atom"?
Democritus
Question 10
A particle smaller than an atom:
subatomic particle
Question 11
What is the value of the charge on an electron?
Negative 1.60 x 10-^19 coulombs
Question 12
Which scientist discovered the electron?
J.J. Thomson
Question 13
J.J. Thomson proved that cathode rays were beams of .....
Question 14
Different forms of the same element, containing the same number of protons but different number of neutrons are:
isotopes
Question 15
Match definitions:
Aufbau Principle
states that each electron occupies the lowest energy orbital available
Pauli's exclusion Principle
principle that states electrons occupying the same orbital must have opposite spin
Hund's Rule
states that every orbital in a subshell has one electron before a single orbital is double occupied with two.