Types of Orbitals and Electron Transitions

Which type of orbital has a different shape from the others?

In what process are photons released when an electron moves from a higher energy level to a lower one?

Which type of spectrum displays lines at specific frequencies of emitted photons?

What type of spectrum shows black lines for 'missing' frequencies of absorbed photons?

Which quantity is proportional to frequency with Planck's constant?

Which quantum value is mentioned in the text as being conserved during electron transitions?

What is the main difference between the Plum Pudding Model and the Electron Shell Model of atomic structure?

Which experiment led to the discovery of the Electron Shell Model of atomic structure?

What part of an atom contains almost the entire mass of the atom?

In a neutral atom, what is the relationship between the number of electrons and protons?

Which phenomenon occurs when not all nuclei of elements are stable due to an imbalance in the ratio of protons and neutrons?

What is emitted when an atom releases excess protons, neutrons, or both?

Why does first ionisation energy increase along a Period in the Periodic Table?

Why does first ionisation energy decrease down a Group in the Periodic Table?

What does a sudden large increase in successive ionisation energies indicate?

Why is the first ionisation energy of aluminium lower than expected?

What do electrons in orbitals represent?

What supports the atomic orbital theory according to the text?