Atomic structure recap

What is the electron configuration of an Fe²⁺ ion? (Tick 2)

• [Ar] 4s2 3d4

• [Ar] 3d6

• 1s2 2s2 2p6 3s2 3p6 3d6

• 1s2 2s2 2p6 3s2 3p6 3d4 4s2

What is the electron configuration of copper?

• [Ar] 3d10 4s1

• [Ar] 3d9 4s2

• [Ar] 3d5 4s1

• 1s2 2s2 2p6 3s2 3p6 4s2 3d9

Explain why the third ionisation energy of thallium is higher than the first ionisation energy of thallium. (Check all that apply)

• Electron removed from shell further away from nucleus.

• Electron removed from shell closer to the nucleus.

• Harder to remove electron from a 2+ ion than an atom.

• Harder to remove electron from a p orbital than an s orbital.

Write an equation for the reaction that occurs when a calcium ion hits the detector.

• Ca(g) --> Ca⁺(g) + e^-

• Ca(g) + e^- --> Ca⁺

• Ca⁺ + e^- --> Ca

• Ca²⁺ + e^- --> Ca⁺

Why does magnesium have a smaller atomic radius than sodium? (Check all that apply)

• Magnesium ions have a higher charge

• Magnesium has an increased nuclear charge

• Shielding decreases

• Same shielding

What is the equation for the third ionisation energy of calcium?

• Ca_(g) --> Ca^+_(g) + e^-

• Ca²⁺_(g) --> Ca^3+_(g) + e^-

• Ca_(g) --> Ca^3+_(g) + e^-

• Ca⁺_(g) --> Ca^3+_(g) + e^-

In a TOF mass spectrometer

KE = 1/2 mv²

v = d/t

Which parameters stay constant? (check all that apply)

• mass

• velocity

• kinetic energy

• distance travelled

What is the general trend in first ionisation energy from Li to Ne? (1 mark)

Name one element which deviates from this trend and explain why it deviates. (3 marks)