Atomic Theory

Front

Who came up with the first atomic theory?

Back

Dalton

Front

What did Thomson's atomic theory model look like?

Back

A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

Front

What did Bohr's atomic theory model look like?

Back

Electrons orbiting the nucleus like the planets around the sun.

Front

What does the cloud model look like in atomic theory?

Back

A cloud of electrons floating around the nucleus.

Front

What did Rutherford discover about atoms?

Back

An atom is mostly empty space, but has a dense positively charged center (nucleus).

Front

What is the mass of a proton?

Back

1 amu

Front

What two particles would you find in the nucleus of an atom?

Back

Protons and neutrons

Front

Who first came up with the idea of an atom and called them "atomos"?

Back

Democritus

Front

What scientist is best known for his "Plum Pudding" model of the atom? Options: J.J. Tomson, Ernest Rutherford, John Dalton, Democritus

Back

J.J. Tomson

Front

Which of Dalton's theories was incorrect? Options: All atoms are identical, All matter is made of atoms, Chemical reactions rearrange atoms, Compounds contain different atoms.

Back

All atoms are identical.