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.
Atomic number as listed on the periodic table is Carbon 6. Carbon 12 and 14 are Isotopes. Carbon, atomic number of 6 has a different weight. the 12 as you stated has 8 neutrons than Carbon 13 would have 9, Carbon 14 would have 10. If this was not so than a contradiction would become evident.