-elements are composed of atoms
-one element cannot be changed into an atom of a different element
-atoms cannot be created or destroyed in any chemical changes
What are John Dalton's atomic theories?
100
The person who discovered the 63 elements in 1869.
Who is Dmitri Mendeleev?
100
a process in which two smaller atomic nuclei are forced together, forming a larger nuclei
What is nuclear fusion?
100
shininess, malleability, ductility, conductivity
What are the physical properties of metals?
100
Elements that are not found naturally on Earth.
What is synthetic element?
200
A term that Rutherford gave to an atom who has a small, positively charged nucleus.
What is a proton?
200
each horizontal row in the periodic table
What is a period ?
200
the number above the chemical symbol on the periodic table
What is the atomic number?
200
material that can be hammered or rolled into flat sheets and other shapes
What is a ductile material?
200
A powerful machine that move atomic nuclei faster and faster until they have reached very high speeds.
What is particle acceleration?
300
The experiment that convinced Ernest Rutheford that the atom has a small positivley charged nucleus.
What is the gold foil experiment?
300
columns on the period table
What are groups?
300
a gas-like state of matter consisting of free electrons and atomic nuclei
What is plasma?
300
the ease and speed with which an element combines, or reacts, with other elements and compounds