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.
Photo Credit Medioimages/Photodisc/Photodisc/Getty Images. Itching on the bottom of the feet has a variety of possible causes. Walking barefoot and wearing sweaty shoes make the feet susceptible to some disorders that cause itching. Other causes, such as scabies, may also cause itching on the bottom of the feet. A dermatologist can evaluate itchy feet to determine the cause and appropriate treatment. Athlete's foot, or tinea pedis, is a fungal infection of the feet that causes itching on the bottom of the feet and between the toes.