These are aluminum atoms. An atom is the smallest particle of an element that has the properties of that element. Some properties of aluminum are: shiny, silver colored, fragile, and thin. Each element has its own type of properties. Chemists use symbols to represent elements. A symbol is a letter or picture used to represent something. Chemists use one or two lettters to represent elements. The symbol for aluminum is Al. The symbol for oxygen is O. A model of an oxygen molecule. The symbol for oxygen is O. O stands for one atom of oxygen.
OCCULT BLOOD Occult blood is blood that cannot be seen without a microscope. Normal urine does not contain any red blood cells, except femalesâ urine during menstruation. Occult blood in someoneâs urine can indicate kidney, bladder, prostate, or vaginal infections.UROBILINOGEN Urobilinogen is a breakdown product of the hemoglobin in red blood cells. It is not found in normal urine! Urobilinogen in a urine specimen may indicate the rapid destruction of red blood cells.ormal urine does not contain any red blood cells, except femalesâ urine during menstruation. Occult blood in someoneâs urine can indicate kidney, bladder, prostate, or vaginal infections.
The fecal occult blood test (FOBT) is a lab test used to check stool samples for hidden (occult) blood. Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum â though not all cancers or polyps bleed. Typically, occult blood is passed in such small amounts that it can be detected only through the chemicals used in a fecal occult blood test. If blood is detected through a fecal occult blood test, additional tests may be needed to determine the source of the bleeding. The fecal occult blood test can only detect the presence or absence of blood â it doesn't indicate potential sources of bleeding.