2.2.1 - Electron Structure

Question 1

State, in words, the 3D shape of an s orbital and a p-orbital. (1)

Answer 1

• s-orbital = spherical
• p-orbital = dumb-bell shape

Question 2

Describe the relative energies of the 2s orbital and each of the three 2p orbitals in a nitrogen atom. (1)

Answer 2

• p-orbitals have greater energy than s-orbitals
• (three) p-orbitals have equal energy

Question 3

A student adds a small volume of aqueous silver nitrate to an aqueous solution of bromide ions in a test-tube. The student then adds a similar volume of dilute aqueous ammonia to the same test-tube. Describe what the student would see in the test-tube after the addition of aqueous ammonia. (1)

Answer 3

• Cream precipitate