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.
Blisters can form on the bottom of the feet as a result of several conditions. Photo Credit Digital Vision./Digital Vision/Getty Images. Blisters are generally small, fluid-filled bubbles that appear just underneath the skin. Blisters are a common cause of foot pain, particularly in runners and other athletes. According to Foot Pain Explained, blisters most often appear on the bottom of the foot, but they can also be found along the sides or on top.