History of the atom

Front

Who used the word "atomos" to describe the uncuttable (indivisible) atom?

Back

Democritus

Front

Proposed that electrons move around the nucleus in specific layers, or shells.

Back

Bohr

Front

This picture best represents ___________________ atomic model.

Back

Thomson's

Front

Rutherford and his students did experiments that showed

Back

nucleus

Front

What is a particle with one negative charge called?

Back

electron

Front

Who discovered electrons?

Back

J.J. Thompson

Front

Order the scientists related to atomic theory from earliest to most recent: Neils Bohr, Ernest Rutherford, JJ Thomson, John Dalton, & Democritus, JJ Thomson, John Dalton, Neils Bohr, Ernest Rutherford, & Democritus, Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr, John Dalton, Neils Bohr, JJ Thomson, Democritus, & Ernest Rutherford

Back

Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr

Front

Ernest Rutherford discovered that the atom was mostly _________________ and has a _______________ charged nucleus.

Back

empty space, positively

Front

Where are the electrons located?

Back

outside the nucleus

Front

Within Dalton's Atomic Theory, he had proposed...

Back

Atoms were the smallest particles that existed and could not be divisible