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.
Occult blood is a laboratory test to see if there is blood hidden in the stool. Testing for occult blood is usually part of every routine physical examination. It may also be done if you are having abdominal (belly) pain. Blood in the stool may be an early sign of a serious problem. Since colorectal (co-lo-REC-tull) cancer is the second leading cause of cancer deaths, early detection is essential. Some foods and dyes, beets and food colors for example, change the color of stool so that it may look like it is bloody.