Examlex
Identify the element whose ion only exists as 1+.
Symmetrical
Having parts that match in size, shape, and position on both sides of a dividing line.
Ordinary Mole
A common type of benign skin growth that appears as a small, dark brown spot, caused by clusters of pigmented cells.
Melanoma
A type of skin cancer that develops from the pigment-producing cells known as melanocytes.
Solid Mass
A physical form of matter that has a defined shape and volume without fluid properties.
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