Vocab Check-in #5

Front

What charge do protons have?

Back

Positive

Front

Who discovered that the atom has a small, dense, positively charged nucleus?

Back

Ernest Rutherford

Front

Which Greek philosopher proposed the concept of 'atomos'?

Back

Democritus

Front

What are the three basic parts that make up an atom?

Back

Protons, neutrons, electrons

Front

Who developed the Billiard Ball Model of the atom?

Back

John Dalton

Front

What is the charge of neutrons?

Back

Neutral

Front

What is the charge of electrons?

Back

Negative

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons

Front

What model did J.J. Thomson propose for the atom?

Back

Plum pudding model

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom's nucleus.