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?

Electron

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

Proton

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

Isotopes

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

Ions

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)

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

Mass Spectrometer

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

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)

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

Ions

What term describes atoms containing a different number of neutrons?

Isotopes

What is the relative atomic mass of carbon?

12.0108 g/mol -1

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

18.0 g/mol -1

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

18 electrons

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

4

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

44.0 g/mol -1

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

1

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

(3 x 12.0) + 16.0 + (6 x 1.0) g/mol -1

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

-1, 0, 1

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

(4 x 12) + (6 x 16) + (6 x 1)

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

-l to l except for n = 3

Study complete lecture notes on the basic structure of atoms, including the three sub-atomic particles: protons, neutrons, and electrons. Learn about isotopes and their significance in chemistry. Authored by Will Stockburn.

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