The mass of an atom relative to that of carbon-12. This is approximately the sum of the number of protons and neutrons in the nucleus. Where more than one isotope exists, the value given is the abundance weighted average. Isotopes. Atoms of the same element with different numbers of neutrons.
Eating disorders. Eating disorders are abnormal eating habits that can threaten your health or even your life. They include: Anorexia nervosa: Individuals believe theyâre fat even when theyâre dangerously thin and restrict their eating to the point of starvation.
What is an eating disorder? An eating disorder is a serious mental illness, characterised by eating, exercise and body weight or shape becoming an unhealthy preoccupation of someone's life. Itâs estimated that one million Australians have an eating disorder, and this number is increasing.