Electronic Configuration

Which of the following statements describes first ionisation energy?

• the energy required to remove one mole of electrons from one mole of gaseous atoms

• the energy required to remove outermost electron from each atom in one mole gaseous atoms

• the ernegy required to remove the outermost electron from each atom in one mole of atoms

• the energy required to produce one mole of ions from one mole of gaseous atoms

These are six unpaired electrons in atoms of element Z. What could be element Z be?

• Sulfur

• Iron

• Carbon

• Chromium

The second ionisation energy of magnesium is 1451 kJ mol^-1.

Which equation correctly represents this statement?

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The diagram shows three orbitals labelled 1, 2 and 3.

What is the correct label for each orbital?

• P_x, P_y and P_z

• S, P_z and P_y

• S, P_x and P_y

• S, P_x and P_z

Ehat is the electronic configuration of the ion with a single negative charge and the atomic number 17?

• 1s² 2s² 2p⁶ 3s¹ 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s¹ 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁵

what is the correct sequence for the orbitals shown in an atom of vanadium in order of decreasing energy?

• 3s 3p 4s 4d

• 4s 3d 3s 3p

• 4s 3d 3p 3s

• 3d 4s 3p 3s

elemet X in period 2 and has the first seven ioniastion energies in kJ mol^-1.

What is the electronic configuration of element X?

• 1s² 2s² 2p⁴

• 1s² 2s² 2p²

• 1s² 2s² 2p³

• 1s² 2s² 2p⁶