The simple view of the bonding in methane You will be familiar with drawing methane using dots and crosses diagrams, but it is worth looking at its structure a bit more closely. There is a serious mis-match between this structure and the modern electronic structure of carbon, 1s 2 2s 2 2p x 1 2p y 1.
Lack of sun exposure: Lack of sun exposure is a major cause of low vitamin d level especially if you live in the northern us. Less likely would be lack of vitamin d in food, but also a possibility if you are on a very restrictive diet.
Vitamin D that is too low often causes no symptoms at first. However, vitamin D deficiency can lead to a loss of bone density (size and strength), broken bones (fractures), muscle weakness, and the bone-thinning disease osteoporosis.Severe vitamin D deficiency can cause rickets in children and osteomalacia in adults.ou can reverse vitamin D deficiency over time by getting enough vitamin D. Take your prescribed dose of vitamin D and keep appointments with your doctor, to ensure the success of your treatment and healthy bones. 1  About Us. 2  Contact Us. 3  Donate.