Chemistry #5 Atoms

As a result of the gold foil experiment, it was concluded that an atom

• Contains a small, dense nucleus

• Contains protons, neutron and electrons

• Has positrons and orbitals

• Is a hard, indivisible sphere

What is the observation and conclusion that Earnest Rutherford made about the gold foil

• observation: Only electrons went though the gold foil

  conclusion: An atoms consists of something else called emectrotrons and it is 2 electron particles combined together

• observation: Most of the alpha particles went though the gold foil

  conclusion: An atoms consists of mostly empty space

• observation: None of the alpha particles went though the gold foil

  conclusion: An atoms consists of no empty space at all

• observation: Most of the alpha particles destoryed the gold foil

  conclusion: An atoms consists of radioactive material that is 1.5 billion times as deadly as a banana

What is another observation and conclusion that Earnest Rutherford made about the gold foil

• Observation: Some of the alpha particles lose their electrons

  conclusion: An atom has a large, heavy, negatively charged nucleus

• Observation: None of the alpha particles get regenerated

  conclusion: An atom has a small, soft, neutral charged nucleus

• Observation: Some of the alpha particles get deflected

  conclusion: An atom has a small, dense, positively charged nucleus

• Observation: All of the alpha particles get destroyed

  conclusion: An atom has a large, dense, negative charged nucleus

Define Orbital

• The least portable location of finding an atom

• The orbit of planets going to the sun

• The rocks that spin around Saturn

• The most portable location of finding a proton and neutron

Which statement describes the distribution of charge in an atom?

• A positively charged nucleus is surrounded by one or more negatively charged electrons.

• A positively charged nucleus is surrounded by one or more positively charged electrons.

• A neutral nucleus is surrounded by one or more negatively charged electrons.

• A neutral nucleus is surrounded by one or more positively charged electrons.

Which particles has the least mass

• Alpha particle

• Beta particle

• Neutron

• Proton

Write the name of the particle from Table O that have 0 as their mass.

• Alpha particle, Beta particle, Neutron and Gamma radiation

• Alpha particle, Beta particle and Electron

• Beta particle (electron), Gamma radiation and Positron

• Beta particle

Write the names of the particles from Table O that have 1 as their mass.

• Electron and Positron

• Beta particle (electron), Gamma radiation and Positron.

• Beta particle and Alpha particle

• Proton and Neutron

What is the number of electrons in an atom that has 3 protons and 4 neutrons

• 3

• 1

• 7

• 4

What does "All atoms are electrically neutral" mean?

• This means that there is about 200,000 kilowatts of electricity in a neutron

• This means that all of the charged particles that make up an atom will ultimately cancel each other out.

• This means that ever single electron in a neutron is always electrically neutral

• This means that every single atom is neutral