Atomic Theory Timeline
Created the Bohr Model
Who is Niels Bohr?
Particles found in the nucleus?
What are protons and neutrons?
Isotope information not found on the periodic table.
What is the mass number?
Relative atomic mass of
Cl-35 75.77%
Cl-37 24.23%
What is 35.46 amu?
Mass number of Magnesium with
Atomic number: 12
Number of protons: 12
Number of neutrons:12
Number of electrons: 12
What is 24 amu?
Created the nuclear model using the gold foil experiment?
Who is Ernest Rutherford?
The space where the electrons are located.
What is the electron cloud?
Atoms of the same element with different numbers of neutrons.
What is an isotope?
Relative atomic mass of
Mg-24 78.99%
Mg-25 10%
Mg-26 11.01%
What is 24.30 amu?
Number of neutrons in Uranium with
Atomic number: 92
Mass number: 238
Number of protons: 92
Number of neutrons:?
Number of electrons: 92
What is 146 amu?
The modern concept the Plum Pudding model mostly resembles.
What is a chocolate chip cookie?
Particle that identifies the element a Bohr model is showing.
What are the number of protons?
Same as atomic number.
What is the number of protons?
Relative atomic mass of
10B 19.9%
11B 80.1%
What is 10.81%?
The nuclear notation of this atom
Element: ?
Atomic number: ?
Number of protons: 11
Number of neutrons: 13
Number of electrons: 11
What is 24Na?
Atomic number: 11
Number of neutrons: 13
The current model that describes the nucleus and its electrons.
What is the electron cloud model?
Valence electrons.
What is the amount of electrons in the outermost shell?
What are the two forms of isotope notation?
What is hyphen form and nuclear form?
Relative atomic mass of
6Li 7.59%
7Li 92.47&
What is 6.94 amu?
The nuclear notation of this ion.
Number of protons: 20
Number of neutrons: 20
Number of electrons: 18
What is 40Ca+2?
Number of protons: 20
Number of neutrons: 20
Created the first ever model called the solid sphere model in 1803.
Who is John Dalton?
Maximum number of electrons outer shell.
What are 8 electrons?
An ion.
What is a charged atom?
Relative atomic mass of
Ne-20 90.48%
Ne-21 0.27%
Ne-22 9.25%
What is 20.19 amu?
The missing information of this element.
Element: Oxygen-17
Atomic number: ?
Mass number: ?
Number of protons: ?
Number of neutrons: ?
Number of electrons: ?
What is....
Atomic number: 8
Mass number: 17
Number of protons: 8
Number of neutrons: 9
Number of electrons: 8