The discovery of atoms

What was Thomson's atomic model commonly called?

• plum pudding model

• electron cloud model

• wooden sphere model

• planetary model

The plum pudding model was proposed by _________

• Rutherford

• J J Thomson

• Dalton

• Joseph Proust

In the plum pudding model, what charge was found in the centre of the atom that kept the electrons attracted to it?

• positive

• negative

Thomson thought that the positive charges in an atom were

• concentrated in the nucleus

• clumped into clusters like plums

• spread throughout the atom

• none of the above

Who proposed the law of conservation of masses?

• J J Thomson

• William Prout

• John Dalton

• Antoine Lavoisier

The law of definite proportions was formulated by ______________.

• Joseph Proust

• Marie Anne

• Antoine Lavoisier

• Rutherford

A special tube that produced rays when connected to the electric circuit is the __________.

• cathode ray tube

• electric tube

• anode ray tube

• none of them

Electrons are __________ charged particles.

• positively

• negatively

• neutral

The tiny particles called corpuscles are actually ________

• atoms

• electrons

• cathode

• anode

• The three types of radiation - alpha particles, beta particles and gamma rays were discovered by _______

• Ernest Rutherford

• JJ Thomson

• John Dalton