Hemolytic uremic syndrome. This rare disorder causes a sharp drop in platelets, destruction of red blood cells and impairment of kidney function. Sometimes it can occur in association with a bacterial Escherichia coli (E. coli) infection, such as may be acquired from eating raw or undercooked meat.
Atomic mass is measured in atomic mass units, or amu. Atomic mass units were taken from one proton or neutron of carbon-12, which each weigh 1 amu. Carbon-12 weighs exactly 12 amu. On the periodic table , you can see that carbon (C) has a number underneath it that is very close to 12. This is called the atomic mass.
The mass number measures the number of protons and neutrons in the nucleus of a particular atom. The atomic mass measures the average mass of all atoms for an element. For example, a carbon atom might have a mass number of 12 or 14 (or something else), but carbon in general has a mass of 12.011 amu.