- They lie along the axes.
- They lie between the axes.
- One is along, one is between.
- Both have a donut shape.

Category: Chemistry
- [Ar]4s23d104p4.
- [Ar]3d104s24p4.
- [Kr]4s23d104p4.
- [Ar]4s43d104p2.
- High.
- Low.
- Zero.
- Undefined.
- [Ar]4s23d10.
- [Ar]3d104s2.
- [Kr].
- [Ar]4s13d104p1.
- Continuous energy levels.
- Quantized energy levels and orbitals.
- Random electron motion.
- Electron mass.
- Bohr's postulates.
- Heisenberg's uncertainty principle.
- De Broglie's hypothesis of wave-particle duality.
- Both B and C.
- To achieve a lower energy state by filling their valence orbitals.
- To increase their mass.
- To become radioactive.
- To increase their electron spin.
- E1s?<E2s?<E2p?<E3s?<E3p?<E4s?<E3d?.
- E1s?<E2s?=E2p?<E3s?=E3p?=E3d?.
- E3d?<E4s?.
- E4p?<E3d?.
- It has the same size but higher energy.
- It is larger and has higher energy.
- It is smaller and has lower energy.
- It has a different shape.
- The path of an electron.
- The energy and probability distribution of an electron.
- The size of the nucleus.
- The number of neutrons.
- [Ar]4s23d104p1.
- [Ar]3d104s24p1.
- [Kr]4s23d104p1.
- [Ar]4s13d104p2.
- Identical.
- Degenerate.
- Different in energy.
- Opposite in spin.
- Oxygen.
- Sulfur.
- Neon.
- Nitrogen.
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