Unit 2 Review- Ionization/Atomic Radius/Electronegativity

Which is an accurate description of this atomic theory model?

• Atoms consist of a nucleus and electrons, where protons and neutrons are at the core and electrons circle the nucleus

• Atoms consist of a nucleus and protons, where protons and neutrons are at the core and electrons circle the nucleus

• Atoms consist of a nucleus and electrons, where electrons and neutrons are at the core and electrons circle the nucleus

• There is a proton cloud that surrounds the nucleus and protons move very fast

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NGSS.MS-PS1-1

Which of the following pieces of evidence are consistent with the atomic theory shown here?

• Electrons and neutrons exist in the nucleus

• Protons and neutrons exist in the nucleus

• Electrons and protons exist in the nucleus

• Electrons, protons, and neutrons exist in the nucleus

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NGSS.MS-PS1-1

Which of the following is not represented in this model?

• It doesn't show that atoms contains protons, neutrons, and electrons

• It doesn't show that electrons are in electron clouds outside the nucleus

• It doesn't show that electrons are in orbit around the nucleus

• It doesn't show the charges of protons and electrons.

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Which atom has the greater atomic radius? Potassium (K) or Cesium (CS)?

• K, because of its more positive nuclear charge

• K, because it has fewer energy levels

• Cs, because of its more positive nuclear charge

• Cs, because it has more energy levels.

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NGSS.HS-PS1-1

Which has the higher first-ionization energy (Cl or Ar)?

• Cl, because of its higher electronegativity

• Cl, because of its greater atomic radius

• Ar, because of its completely filled valence shell

• Ar, because of its more positive nuclear charge.

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NGSS.HS-PS1-1

Which of the following was a limitation of Thompson's plum pudding atomic theory model, shown here?

• It does not show that atoms have charges

• The model does not show the existence of electrons

• It doesn't show a nucleus

• It doesn't show the existence of subatomic particles

Which of the following represented an atom of Oxygen (O)

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• 
• 
• 

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Which of the following represented an atom of Sulfur (S)?

• 
• 
• 
• 

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Which of the following represented an atom of Nitrogen (N)?

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• 
• 
• 

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The data table shows the atomic radius (in picometers, pm) and the first ionization energy (in kilojoules

per mol, kJ/mol) of calcium.

Based on periodic trends, the data in the table above, and its location in the periodic table, which of the

following are the most probable values of the atomic radius and the first ionization energy for potassium (K)?

• 242 pm

  633 kJ/mol

• 242 pm

  419 kJ/mol

• 120 pm

  633 kJ/mol

• 120 pm

  419 kJ/mol

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NGSS.HS-PS1-1

NGSS.HS-PS1-2