The repeating periodicity of the blocks of 2, 6, 10, and 14 elements within sections of the periodic table arises naturally from the total number of electrons that occupy a complete set of s, p, d and f atomic orbitals, respectively, although for higher values of the quantum number n, particularly when the atom in question bears a positive charge, the energies of certain sub-shells become very similar and so the order in which they are said to be populated by electrons (e.g. Cr ...
Bursitis (sore toes) A bursa is a small fluid-filled sac located near a joint, bone or tendon which protects the area from friction. Bursitis is an inflammation of the bursa, and commonly occurs in the little toe. If your toe feels 'squidgy' and is causing you pain, bursitis may be the cause.
1 Nerve entrapment may cause shooting, burning pain or sensitivity on the top of the foot. Nerve entrapment on the top of the foot may be due to excess pressure on the nerve from a tight shoe.  Another common type of nerve entrapment is tarsal tunnel syndrome.