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CHM1011 - Chemistry I - S1 2025

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Write out the full electronic configuration for Cl-.

Hint for answering: The full electronic configuration of C is 1s2 2s2 2p2

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The five ionisation energies below represent successive ionisation energies (IE) for a Period 2 element. Determine the identity of this element.

IE1 = 801 kJ mol-1, IE2 = 2427 kJ mol-1, IE3 = 3660 kJ mol-1, IE4 = 25026 kJ mol-1, IE5 = 32827 kJ mol-1

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The number of radial nodes in a 5f orbital is
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The total number of nodes in a 3s orbital is
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The number of planar nodes in a 7p orbital is
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Which of the following set of quantum numbers is not possible?
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Which of the following is not an allowed orbital?  
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Which type of orbital does the following refer to: principal quantum number, n=4, angular momentum quantum number, l=2?  
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The angular momentum quantum number, l, for a 6s orbital is
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A molecule emits light a photon with an energy of 8x10-19 J.  What is the wavelength in metres of this photon?

Speed of light is 3.00 x 108 m s-1.  Planks constant is 6.626 x 10-34 J s.

Give your answer to 3 significant figures. Do not enter units!

For large or small numbers, use scientific notation, for example 1.23E-4

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