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.
For instance, to a first approximation, 1 gram of hydrogen element (H), which has a mass number of 1 (atomic number 1), has 7023602200000000000â 6.022Ã1023 hydrogen atoms. Similarly, 12 grams of 12 C, with the mass number of 12 (atomic number 6), has the same number of carbon atoms, 7023602200000000000â 6.022Ã1023. Avogadro's number is a dimensionless quantity and has the numerical value of the Avogadro constant given in base units.