A Particular Radioactive Element Has a Half-Life of 63 Days

question 14

Multiple Choice

A particular radioactive element has a half-life of 63 days. What percent of the original sample is left after 189 days?

• A) 12.50 %
• B) 25.00 %
• C) 75.00 %
• D) 50.00 %
• E) 33.33 %

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Definitions:

Spine

The column of vertebrae extending from the base of the skull to the tailbone, providing structural support and protecting the spinal cord.

Skull

The bony structure forming the head that protects the brain and supports the structures of the face.

Parietal Bone

A bone forming part of the side and top of the skull, located behind the frontal bone and in front of the occipital bone.

Osteoporosis Prevention

Methods or strategies aimed at preventing the development of osteoporosis, a condition characterized by porous and fragile bones, through diet, lifestyle changes, and sometimes medication.