FZC007 Chemistry Lecture Notes: The Atom and Isotopes

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Questions and Answers

What sub-atomic particle has a relative mass of 0 and a relative charge of -1?

  • Isotope
  • Electron (correct)
  • Neutron
  • Proton

Which sub-atomic particle is responsible for the identity of an element?

  • Electron
  • Neutron
  • Proton (correct)
  • Isotope

What term is used for atoms of the same element that contain a different number of neutrons?

  • Ions
  • Molecules
  • Isotopes (correct)
  • Relative masses

Which term is used for atoms of the same element that contain a different number of protons or electrons?

<p>Ions (A)</p> Signup and view all the answers

What is the average mass of an atom of an element compared to 1/12th the mass of an atom of carbon-12 called?

<p>Relative Atomic Mass (Ar) (C)</p> Signup and view all the answers

Which instrument can be used to find the masses of different isotopes?

<p>Mass Spectrometer (C)</p> Signup and view all the answers

What is the mass of an atom of an isotope of an element compared to 1/12th the mass of an atom of carbon-12 called?

<p>Relative Isotopic Mass (C)</p> Signup and view all the answers

What is the average mass of a molecule compared to 1/12th the mass of an atom of carbon-12 called?

<p>Relative Molecular Mass (Mr) (C)</p> Signup and view all the answers

What type of atoms have a different number of protons or electrons?

<p>Ions (C)</p> Signup and view all the answers

What term describes atoms containing a different number of neutrons?

<p>Isotopes (B)</p> Signup and view all the answers

What is the relative atomic mass of carbon?

<p>12.0108 g/mol -1 (C)</p> Signup and view all the answers

What is the Relative Molecular Mass (Mr) of Water, H2O?

<p>18.0 g/mol -1 (A)</p> Signup and view all the answers

What is the Maximum number of electrons that can be present in the 3rd shell (n = 3)?

<p>18 electrons (D)</p> Signup and view all the answers

What is the Principal Quantum Number for the 4th shell (n = 4)?

<p>4 (D)</p> Signup and view all the answers

What is the Relative Molecular Mass (Mr) of Carbon Dioxide, CO2?

<p>44.0 g/mol -1 (C)</p> Signup and view all the answers

What is the Principal Quantum Number for the 1st shell (n = 1)?

<p>1 (B)</p> Signup and view all the answers

What is the Relative Molecular Mass (Mr) of Ethanol, CH3CH2OH?

<p>(3 x 12.0) + 16.0 + (6 x 1.0) g/mol -1 (C)</p> Signup and view all the answers

What is the angular momentum quantum number, l, for the 2nd shell (n = 2)?

<p>-1, 0, 1 (A)</p> Signup and view all the answers

What is the Relative Molecular Mass (Mr) of Acetone, CH3COCH3?

<p>(4 x 12) + (6 x 16) + (6 x 1) (D)</p> Signup and view all the answers

What is the range of magnetic moment numbers (ml) for the 3rd shell (n = 3)?

<p>-l to l except for n = 3 (B), -l to l except for n = 3 (C)</p> Signup and view all the answers

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