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WorksheetsUnit 2 Review- Ionization/Atomic Radius/Electronegativity
Total questions: 20
Worksheet time: 19mins
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
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
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.
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.
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.
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)
Which of the following represented an atom of Sulfur (S)?
Which of the following represented an atom of Nitrogen (N)?
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
A student is writing a chemical reaction to demonstrate the reaction between calcium (Ca) and chlorine gas
(Cl2), as shown below:
Ca + Cl2 → CaCl2
Which of the following identifies and best explains which element will react in the same way as Ca?
Magnesium (Mg); it is in the same group as calcium (Ca) and has the same number of valence electrons.
Fluorine (F); it is the same group as chlorine (Cl) and has the same number of valence electrons.
Potassium (K); it is in the same period as calcium (Ca) and has a lower electronegativity.
Gallium (Ga); it is in the same period as calcium (Ca) and has a greater electronegativity.
Which of the following best predicts and explains whether sodium or potassium has a larger atomic radius?
Sodium has a larger atomic radius because sodium has more electrons in electron shells that are further
from the nucleus than potassium does.
Sodium has a larger atomic radius because sodium has greater electrostatic attraction between the
nucleus and the electrons than potassium does.
Potassium has a larger atomic radius because potassium has more electrons in electron shells that are
further from the nucleus than sodium does.
Potassium has a larger atomic radius because potassium has greater electrostatic attraction between the
nucleus and the electrons than sodium does.
Which of the following are the most probable values for the atomic radii of sodium and potassium, respectively?
(Note: pm is picometer, which is a unit of measurement.)
5 pm, 3,452 pm
3,452 pm, 5 pm
190 pm, 240 pm
240 pm, 190 pm
Which of the following best predicts and explains whether magnesium or calcium has a greater ionization
energy?
Magnesium has a greater ionization energy because the valence electrons of magnesium are closer to the
nucleus experiencing a greater electrostatic force of attraction than calcium does.
Magnesium has a greater ionization energy because magnesium has fewer electrons in electron shells
than calcium does.
Calcium has a greater ionization energy because the valence electrons of calcium are further away from
the nucleus experiencing a weaker electrostatic force of attraction than calcium does.
Calcium has a greater ionization energy because calcium has more electrons in electron shells than
magnesium does.
Which of the following are the most probable values for the first ionization energies of magnesium and calcium,
respectively?
490 kJ/mol,
730 kJ/mol
730 kJ/mol,
490 kJ/mol
490 pm, 730 pm
730 pm, 490 pm
Which of the following correctly compares the identities of Atom A, Atom B, and Atom C, with the correct
reasoning?
Atom A and Atom C are the same element because they have the same number of energy levels.
Atom A and Atom B are the same element because they have the same number of valence electrons.
Atom A and Atom C are different elements because they have different numbers of protons.
Atom A and Atom B are different elements because they have different numbers of electrons.
One electron is removed from Atom A. Which of the following describes how the overall charge of Atom A will
change?
The overall charge will remain neutral because if one electron is removed, a proton must also be
removed.
The overall charge will remain neutral because the number of neutrons remains the same.
The overall charge will become positive because the number of protons is greater than the number of
electrons.
The overall charge will become negative because the number of protons is less than the number of
electrons.
Which of the following describes the difference in ionization energies between Atom A and Atom C?
The ionization energy of Atom A is greater than the ionization energy of Atom C.
The ionization energy of Atom A is less than the ionization energy of Atom C.
The ionization energy of Atom A is equal to the ionization energy of Atom C.
No conclusion can be made about the ionization energy of Atom A and Atom C.
Which of the following predicts which atoms will react with each other and provides accurate reasoning?
Atom B will react with Atom C, because Atom B is a non-metal while Atom C is a metal.
Atom B will react with Atom C, because Atom B has a larger atomic radius compared to Atom C.
Atom A will react with Atom B, because they both have the same number of valence electrons and have
similar reactivity.
Atom A will react with Atom C, because Atom C has a higher electronegativity compared to Atom A.
A student conducts two reactions in which Atom A and Atom B are each combined with water. Which of the
following correctly predicts how Atom A and Atom B will react with water and provides accurate reasoning?
Atom A will react more violently with water because it has more valence electrons than Atom B.
Atom A will react more violently with water because it has a higher electronegativity than Atom B.
Atom B will react more violently with water because it has a lower electronegativity than Atom A.
Atom B will react more violently with water because it has a more positive nuclear charge than Atom A.
