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WorksheetsAtomic Theory
Total questions: 20
Worksheet time: 17mins
J.J Thomsons model of an atom, in which he thought electrons were randomly distributed within a positively charged cloud
Bohr Model
Plum pudding model
Cathode Ray model
Cloud Model
the number of protons in the nucleus of an atom
neutrons
isotopes
atomic number
mass number
1909-solar system model of the atom, gold foil experiment- fired negative ions at thin sheet of gold foil, discovered the atomic nucleus and proposed a nuclear model of the atom .
JJ Thompson
Ernest Rutherford
James Chadwick
John Dalton
A Greek Philosopher (a) , taught Alexander the Great, started a famous school, studied with Plato
A negatively charged ion is called (a)
(a) are the particles of the nucleus that have no charge.
1913- discovered that electrons move around the nucleus in orbits called electron shells
Ernest Rutherford
James Chadwick
Niels Bohr
JJ Thomson
Atoms of the same element that have different numbers of neutrons
ions
isotopes
neurons
cations
How many neutrons are in this element?
(a)
What is the atomic mass of the following element?
(a)
1) elements are composed of atoms. 2) atoms of same element are identical, but differ from other elements. 3) elements can mix together 4) atoms only change when mixed with other elements; were part of the Atomic Theory which was formulated by
Ernest Rutherford
James Chadwick
Robert Milliken
John Dalton
A positively charged ion is called a
(a)
How many protons are in this element?
(a)
How do you calculate the protons that are located in an element?
What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?
19
20
39
58
The nucleus of an atom consists of 8 protons and 6 neutrons. The total number of electrons present in a neutral atom of this element is
(a)
1) Atoms of 16O, 17O, and 18O have the same number of
neutrons, but a different number of protons
electrons, but a different number of protons
protons, but a different number of electrons
protons, but a different number of neutrons
How many neutrons are in the nucleus of the atom shown
(a)
Which of the following has a charge of +2?
electron
neutron
proton
photon
Thomson made his discovery about the atom during an experiment using
thermal energy
cathode rays
kinetic energy
x-rays
