Systemic scleroderma (systemic sclerosis) - blood vessels and internal organs are also affected (as well as the skin). The patient may experience fatigue (tiredness), weight loss and muscle pains. A risk factor is something which increases the likelihood of developing a condition or disease.
The Atomic number of Carbon is 6. The Atomic mass of Carbon depends on the isotope and may be from 8 to 22. Carbon 12 and Carbon 13 are the only stable isotopes of Carbon. Carâ¦bon 14 is the longest-lived unstable (radioactive) isotope. Only Carbon 12, 13 and 14 are found in nature.
Facts About Carbon. 1  Atomic Number (number of protons in the nucleus): 6. 2  Atomic Symbol (on the Periodic Table of Elements): C. 3  Atomic Weight (average mass of the atom): 12.0107. 4  Density: 2.2670 grams per cubic centimeter. 5  Phase at Room Temperature: Solid. 6  Melting Point: 6,422 degrees Fahrenheit (3,550 degrees C)