The Atom and Its Electrons

This model this model was the first to show a nucleus, consisting of protons and neutron.  Electrons surround the nucleus but are not shown in distinct energy levels. 

• The "Rutherford Model" of the atom
• The "Plum Pudding Model" of the atom
• The "Quantum Mechanical Modell" of the atom
• Democritus's model of the atom

Tags

NGSS.MS-PS1-1

This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.

• Democritus's model of the atom
• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• The "Quantum Mechanical Model" of the atom

Tags

NGSS.MS-PS1-1

This is the most complete and current model of the atom. It consists of 61 elementary particles. Electrons are located in complex orbitals.

• The "Quantum Mechanical Model" of the atom
• The "Rutherford Model" of the atom
• The "Plum Pudding Model" of the atom
• The "Bohr Model" of the atom

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.

• The "Bohr Model" of the atom
• The "Rutherford Model" of the atom
• The "Plumb Pudding Model" of the atom
• The "Quantum Mechanical Model" of the atom

Tags

NGSS.MS-PS1-1

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• Democritus's model of the atom
• The "Quantum Mechanical Model" of the atom

Tags

NGSS.MS-PS1-1

Ernest Rutherford discovered that atoms were mostly _________________. 

• negatively charged
• positively charged
• electrons
• empty space. 

Discovered the electron using cathode ray tube.

• Thomson

• Dalton

• Rutherford

• Bohr

An orbital is a region in an atom where there is a high probability of finding

• an alpha particle

• an electron

• a neutron

• a positron

Compared to the energy of an electron in the second shell of an atom of sulfur, the energy of an electron in the

• first shell is lower.

• first shell is the same.

• third shell is lower.

• third shell is the same.

Which statement describes the charge and location of an electron in an atom?

• An electron has a positive charge and is located outside the nucleus.

• An electron has a positive charge and is located in the nucleus.

• An electron has a negative charge and is located outside the nucleus.

• An electron has a negative charge and is located in the nucleus.