(Click the button above the tens place three times. Push the Gridbutton on the phosphor screen, and set the Magnetic Fieldto 30 Drag the lab window down and left and the phosphor screenwindow up and right in order to The phosphor screen detects charged particles (such aselectrons) and it glows momentarily at the positions where theparticles impact the screen.Ĥ. What do you observe? A dot in the center of thescreen What detector is used in this experiment? A phosporScreenģ. What type of charge do electrons have? Negative What source is used in this experiment? Drag yourcursor over the source to identify it. The lab will open inthe Quantum laboratory.Ģ. Start Virtual ChemLab and select Alpha and BetaParticles from the list of assignments. Ernest Rutherford used alpha particles in his Gold FoilExperiment.ġ.

Helium nucleus, or a helium atom without its two electrons.Consequently, an alpha particle is positivelyĬharged. Another particle ejected during nuclear decay is thealpha particle. Robert Millikan usedbeta particles in his famous Oil DropĮxperiment. Particles in the context of nuclear decay. They called these particleselectrons, but they are also known as beta Ibolded the questions that I could not finish.ġ-4: Investigating the Properties of Alpha and BetaParticlesĪs scientists began investigating the properties of atoms, theirfirst discovery was that they could extract Please help me finish lab.my lab stopped working and I can'tget the labs to finish.

Virtual chemlab