Atomic Theory
Subatomic Particles
The Atom
Periodic Table
Ions
100
The philosopher who came up with the term 'atomos'
Who is Democritus
100
This subatomic particle has no charge (is neutral)
What is the neutron
100
This makes up 99.99999999% of an atom
What is empty space
100
The periodic table is arranged in increasing order of this number.
What is the atomic number
100
Ions are formed by changing the amount of this subatomic particle of an atom
What are the electrons
200
Famous for his discoveries from the Gold Foil Experiment
Who is Ernest Rutherford
200
This subatomic particle determines the identity of an atom.
What is the proton
200
This is where most of the mass of an atom is found
What is the nucleus
200
the rows of the periodic table
What are periods
200
A loss of electrons results in this charge
What is a positive charge
300
The first subatomic particle discovered by JJ Thompson
What is the electron
300
This subatomic particle is the only one that does not reside in the nucleus
What is the electron
300
This is the arbitrary unit of mass that scientists developed to measure the mass of atoms.
What is the atomic mass unit (amu)
300
the columns of the periodic table
What are groups or families
300
This is the name of the positive ion
What is the cation
400
Niels Bohr predicted that these subatomic particles resided on rings around the nucleus.
What are electrons
400
These subatomic particles both have a mass of ~ 1 amu
What are the proton and the electron
400
Different forms of an atom with the same number of protons but a different number of neutrons
What are isotopes
400
Group 18 of the periodic table
What are the noble gases
400
This is the magic number of electrons that complete a valence shell of an atom, making it stable
8 electrons
500
This scientist developed our current atomic model, the wave-mechanical model.
Who is Werner Heisenberg
500
The electrons reside in these 'clouds of probability' in our current atomic model
What are electron orbitals
500
This number is the true sum of the protons and neutrons of an atom that appears in the nuclear symbol.
What is the mass number
500
The 2nd column of the periodic table
What are alkaline-earth metals
500
When ions are formed, often times the ionic electron configuration resembles an element from this group on the periodic table.
What is a noble gas
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