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.
Asker's rating. 1  Atomic number as listed on the periodic table is Carbon 6. 2  If Carbon 12 has 8 neutrons than it must have 4 protons to have a mass number of 12, thus carbon 12. 3  Carbon 12 refers to the mass of the carbon atom in atomic mass units (amu), which is the mass of protons and neutrons in the nucleus. Atomic number for all Carbon atoms is 6, this also refers to the number of protons in the nucleus. Any atom with only 6 protons in the nucleus will be carbon regardless of atomic mass.