An Avogadro’s number (6.023 x 1 0²³) of whatever units are being considered. One gram molecular weight of an element or a compound (i.e., same number of grams of an element or a compound as that substance’s molecular weight, equal to 6.023 x 10²³ molecules).
Molecular weight of a compound expressed in grams.
Densely packed skin cells that are pigmented brown or black.
A dark raised spot on the skin.
An SI unit of measurement of the amount of a substance.
A colored spot on the skin derived from cells that contain melanin, the pigment that gives skin its color; also known as a nevus. When a mole changes color or shape, it may indicate malignant melanoma, a serious form of skin cancer.
A brown spot on the skin derived from cells that contain melanin, the pigment that gives skin its color; also known as a nevus. When a mole changes color or shape, it may indicate malignant melanoma, a Serious form of skin cancer. Risk factors for melanoma include having asymmetrical or unusually colored moles or more than 40 moles; a family or personal history of melanoma; having spent a lot of time outdoors; a tendency to b urn or freckle easily when exposed to the sun; and overexposure to X rays or other forms of radiation.
In the Systeme International d’ Unites (SI system), 1 mole of a substance contains as many atoms as exist in 0.012 kg of carbon 12.
A uterine mass arising from a poorly developed or degenerating ovum.
Small, brownish spot or blemish on the skin, ranging in color from pale tan to brown or bluish black.
A formation in the uterus that occurs when a pregnancy terminates and breaks down.
The term is broadly used to describe any skin imperfection.