the gold foil Scattering Year 11

The rate at which a radioactive element decays is its ____.

• quarter life
• whole life
• wonderful life 
• half life

Tags

NGSS.HS-PS1-8

Name the instrument used to detect radioactivity.

• voltmeter
• ohmeter
• seismograph
• geiger counter

Tags

NGSS.HS-PS1-8

Which scientist was not involved in the gold foil experiment?

• Ernest Rutherfud
• Hans Geiger
• Ernest Marsden
• Thomas Dalton

What particle was used in the gold foil experiment?

• Beta Particle
• Alpha particle
• Gamma ray 

Approximately how many particles totally rebounded back towards the source?

• 50%
• 1/8000
• 1/400
• 1/200

A zinc sulphide fluorescent screen was used to detect the particles scattering.  A scintillation was observed - what is a scintillation?

• A high pitched sound.
• A small sound with visible light
• a small flash of visible or ultraviolet light
• a small vibration on the wall of the screen

Most of the alpha particles went straight through the gold foil.  This suggested that....

• There is no interference between alpha and gold.
• Most of the atom is made up of empty space.
• The alpha particles were very tiny.
• None of the above

Some of the alpha particles fired at the gold foil were deflected at angles.  This was due to...

• reflection of the alpha source when it it the fluorescent screen.
• The alpha particles hitting the gold nucleus.
• Repulsion forces between the positively charged nucleus and the positively charged alpha particles. 
• A mis-firing of the alpha source

Which scientist came up with the Plum pudding theory?

• Hantaro Nagaoka
• Ernest Rutherfud
• J.J Thomson
• Charles Darwin

What did the Plum pudding model suggest about the structure of atoms?

• That neutrons and electrons were arranged in a sphere.
•  that is was a sphere of positive charge throughout which the electrons were distributed
• That an atom was filled with neutrons, protons and a sphere of negative charge. 
• That neutrons, protons and electrons were distributed throughout a sphere.