CHEM Test 5 (9th) 21-22

What greek philosopher uggested that matter is composed of tiny indivisible particles called Atoms ?

• Democritus

• Aristotle

• Pythagoras

The name atom was derived from the latin word "Atomos" which means

• with division

• without division

• none of the above

In what century John Dalton put forward his atomic theory ?

• 13th century

• 15th century

• 19th century

In the 20th century, experiments performed revealed that atoms are made up of subatomic particles like electrons, protons and neutrons.

• True

• False

According to Dalton, an atom is an indivisible, hard and dense sphere.

• True

• False

• Thomson Atomic Model

• Rutherford Atomic Model

• Democritus Atomic Model

Thomson postulated that atoms were solid structures of positively charge with tiny negative particles stuck inside.

• True

• False

Explain the cathode rays experiment