Scientists
Philosopher who believed everything was made of solid indivisible "atomos"
Who is Democritus?
3 subatomic particles
What are electron, neutron, and proton?
the current atomic model where electrons are found in areas of probablity
What is the electron cloud or quantum model?
How is the periodic table organized and elements identified?
What is atomic number?
Outermost electrons
What are valence electrons?
Scientist who was credited with discovering the nucleus.
Who is Rutherford?
subatomic particle that is found outside the nucleus with a negligible mass
What is an electron?
Which model described the atomic model as a mass of positive charge with negative charges spread throughout
What is the plum pudding model?
Horizontal rows
What are periods?
Name of the group 8 inert gases
What are noble gases?
Scientist who developed atomic theory
Who is Dalton?
location of protons and neutrons
What is the nucleus?
Which model built off Rutherford's model, but placed electrons in specific orbitals with energy levels?
What is Bohr's model?
The type of element that make up most of the periodic table.
What are metals?
Highly reactive group 1 elements
Alkali metals
Scientist who discovered the electron
Who is Thomson?
Atoms of the same element with different number of neutrons
What are isotopes?
The model that first included a nucleus, but did not explain electron behavior.
What is Rutherford's planetary model?
The name of the middle block of elements
What are transition metals/elements?
Elements that do not conduct electricity, dull, and brittle.
What are nonmetals?
Rutherford's 2 conclusions after the gold foil experiment as a result of alpha particles reflecting instead of all passing straight through
What is atom's have a dense nucleus, but are mostly empty space?
positively charged ions
What is a cation?
How does the modern atomic model describe electron behavior?
What is particle and wave behavior?
Elements that have similar characteristics
What is a group?
Name of scientist credited with periodic table development
Who is Mendeleev?