The Activity of a Sample Reduces from 7 $10 ^ { 9 }$

question 79

Short Answer

The activity of a sample reduces from 7.55 × $10 ^ { 9 }$ Bq to 5.11 × $10 ^ { 9 }$ Bq in 5.50 months.
(a)What is its half life?
(b)How many months from the start must one wait for the activity to decrease to 10% of its original value?

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Definitions:

Mesoderm

Middle of the three germ layers of an embryo.

Mesoderm

The middle layer of an embryo in early development, which gives rise to muscles, bones, and circulatory and excretory systems.

Epiblast Cells

The cells in the early embryo that give rise to all of the body's tissues and organs during development.

Germ Layer

One of three layers in the embryo (ectoderm, endoderm, or mesoderm) from which the four primary tissue types arise.