Chemistry Flashcard 2 Practice

Front

What particle was discovered through cathode ray experiments?

Back

Electron

Front

What is an alpha particle?

Back

It is a particle that has a 2+ charge.

Front

According to Dalton's atomic theory, are atoms indivisible?

Back

False

Front

Who was Ernest Rutherford?

Back

A New Zealand born physicist who established the existence of a positively charged nucleus in an atom.

Front

Whose atomic model is known for the discovery of the electron?

Back

Thomson

Front

What is the charge of a proton?

Back

Positive (+1) charge.

Front

What is the charge of a neutron?

Back

Neutral (0) charge.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

The existence of a small, dense, positively charged nucleus.

Front

What is the main postulate of Dalton's atomic theory regarding atoms?

Back

Atoms are the basic building blocks of matter.

Front

What is the mass of an electron compared to a proton?

Back

An electron has a much smaller mass than a proton.