Ch 4 Vocab Flashcards

Front

Democritus

Back

First to identify the atom

Front

Dalton

Back

Theorized that different elements have different masses.

Front

Bohr

Back

Theorized that electrons orbit the nucleus like planets around the Sun.

Front

Rutherford

Back

"Discovered" the nucleus with the gold foil experiment.

Front

Thomson

Back

First to theorize subatomic particles.

Front

electron

Back

A negatively charged subatomic particle found in the space outside the nucleus.

Front

atomic number

Back

Equals the unique number of protons in an element's nucleus.

Front

neutron

Back

A neutral subatomic particle found in the nucleus of an atom.

Front

electron cloud

Back

A virtual model of the most likely locations where the probability of finding an electron is high.

Front

orbital

Back

A region of space around the nucleus where an electron is likely to be found.