A Certain Radioactive Element Has a Half-Life of 20 D

question 95

Multiple Choice

A certain radioactive element has a half-life of 20 d.The time it will take for 7/8 of the atoms originally present to disintegrate is

• A)20 d
• B)40 d
• C)60 d
• D)80 d
• E)100 d

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Definitions:

Suffix

An affix that is added to the end of a word to change its meaning or function.

Obstetrics

A branch of medicine and surgery concerned with childbirth and the care of women giving birth.

Biopsy

A medical test involving the removal of tissue from a living body to examine it for disease.

Acronym

A word formed from the initial letters of other words, used for brevity in writing and speaking.