Failure to consume adequate amounts of nutrients can lead to noticeable and measurable physical changes that are of deficiency disease.

Symptoms

Failure to consume adequate amounts of nutrients can lead to noticeable and measurable physical changes that are symptoms of deficiency disease.

Explanation:

Deficiency diseases are identified by certain symptons that can be discovered by physical examination such as:

- bleeding gums, in the case of scurvy (vitamin C deficiency)

- inability to see at night or in dark areas, as in the case of Night-blindness (Vitamin A deficiency)

- weak bones, as in the case of rickets (vitamin D deficiency).

Thus, symptoms are the changes that are associated with deficiency disease, and are easily noticed and measured.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.