Top 10 unbelievable historical concurrencies. A glucocorticoid is a type of steroid hormone which is produced in the cortex of the adrenal gland: cortisol is probably the most well known and common example of a glucocorticoid.
carbon is a special eleme having 4 electron in its outer shell so to complete its octect it needs to share its electron in a covalent bond. carbon is a special eleme having 4 electron in its outer shell so to complete its octect it needs to share its electron in a covalent bond.
Atoms in these periods may follow the octet rule, but there are conditions where they can expand their valence shells to accommodate more than eight electrons. Sulfur and phosphorus are common examples of this behavior. Sulfur can follow the octet rule as in the molecule SF2. Each atom is surrounded by eight electrons. It is possible to excite the sulfur atom sufficiently to push valence atoms into the d orbital to allow molecules such as SF4 and SF6. The sulfur atom in SF4 has 10 valence electrons and 12 valence electrons in SF6.