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Vocab
History
Element Groups
Periodic Table
Misc
100
area around the nucleus of an atom where electrons are most likely to be found
What is electron cloud
100
he proposed the original model of an atom
Who is Democritus
100
their energy levels are stable and are located on the far right of the periodic table
What are noble gases
100
total # of protons and neutrons in an atoms nucleus
What is mass number
100
mass of an atom comes from these
What are protons and neutrons
200
an atom that has the same # of protons but different # of neutrons
What is an isotope
200
he created the Law of Conservation of Mass where mass is neither created nor destroyed
Who is Lavoisier
200
they tend to lose electrons to form positive ions and are located on the left side of the periodic table
What are metals
200
the vertical columns on the periodic table
What are groups
200
this type of atom has no charge where protons and electrons
What is a neutral atoms
300
charged particle has either more or fewer electrons than protons
What is an ion
300
he shot alpha particles at atoms of gold foil and found that concluded electrons must orbit the positively-charged center like the solar system
Who is Rutherford
300
they tend to gain electrons to form negative ions and are located on the right side of the periodic table
What are nonmetals
300
the horizontal rows on the periodic table
What are periods
300
dot diagrams are used to show these
What are valence electrons
400
the weighted average mass of all naturally occurring isotopes of an element
What is average atomic mass
400
he created the law of multiple proportions where when elements combine they do so in ratios of small whole numbers
Who is John Dalton
400
this is the difference between Alkali metals and Alkaline Earth metals
What is the # of valence electrons (Alkali=1, Alkaline=2)
400
what does every box on the period table contain?
What is element name, atomic number, chemical symbol, and atomic mass
400
the 3 subatomic particles and their charges
What is protons (+), neutrons (0), and electrons (-)
500
smaller particles that make up protons and neutrons
What are quarks
500
these 3 guys discovered the proton, neutron, and electron
Who are Goldstein, Chadwick, and Thompson
500
these lie in between metals and nonmetals and have characteristics of both
What are metalloids
500
he created the first periodic table arranged by atomic mass
Who is Mendeleev
500
the mass of an atom comes from these
What are protons and nuetrons