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.
carbon 12 13 and 14 are the three isotopes of carbon. All carbon atoms have 6 protons but the number of protons can vary. The number is the atomic mass, or the sum of the protons ans neutrons. Carbon 12 (the most common) has 6 protons and 6 neutrons.hus, Carbon-14 has one more neutron than Carbon-13. For reference, when we say carbon, we speak of carbon-12, so carbon-13 and carbon-14 are both isotopes of carbon-12, with the first having one more neutron than carbon-12 and the latter having two more neutrons than carbon-12.