FZC007 Chemistry Lecture Notes: The Atom and Isotopes

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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?

Ions 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?

Relative Atomic Mass (Ar) Signup and view all the answers

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

Mass Spectrometer 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?

Relative Isotopic Mass 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?

Relative Molecular Mass (Mr) Signup and view all the answers

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

Ions Signup and view all the answers

What term describes atoms containing a different number of neutrons?

Isotopes Signup and view all the answers

What is the relative atomic mass of carbon?

12.0108 g/mol -1 Signup and view all the answers

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

18.0 g/mol -1 Signup and view all the answers

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

18 electrons Signup and view all the answers

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

4 Signup and view all the answers

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

44.0 g/mol -1 Signup and view all the answers

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

1 Signup and view all the answers

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

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

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

-1, 0, 1 Signup and view all the answers

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

(4 x 12) + (6 x 16) + (6 x 1) Signup and view all the answers

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

-l to l except for n = 3 Signup and view all the answers