The 2,400-year search for the atom

Democritus proposed, in 440BC that everything is made up of ...

• tiny bubbles

• tiny pebbles

• tiny particles

Democritus said that these particles are surrounded by ...

• 
  

  outer space

• empty space

• space jam

What did Democritus call these particles?

• asteroids

• atoms

• atomics

What did the other philosophers think that matter was made from?

• Earth, Wind & Fire

• Water, fire, eggs. air

• earth, wind, fire, water

• https://youtu.be/god7hAPv8f0

In 1808 John Dalton showed that substances always broken down into the same ………………………. in the same proportions.

• elements

• atoms

• particles

He showed that the compounds were the combinations of the same ………………...

• particles

• elements

• atoms

What did J.J Thompson discover about the structure of an atom in 1897?

• the cookie

• the electron

• the chocolate chips

He suggested the atoms was a sphere packed with …………….. matter, filled with ………………. charged electrons.

• negative; positive

• positive; negative

Most of the mass of an atom is concentrated in the centre.  Rutherford called this the ......

• nucleus

• vacuole

• mitochondrion

Rutherford's experiment suggested that the atom actually consists of mostly ......

• busy space

• empty space

• outer space