The isotope 
has a half-life of 21 hours. If a sample initially contains exactly 10000 atoms of 
, approximately how many of these atoms will remain after one week?
Definitions:
Alleles
Variants of a gene that occur at the same place on a chromosome, contributing to the diversity of organisms' traits.
Introspection
The inspection or analysis of one's own psychological and emotional state.
Abstract Painting
A form of art that does not attempt to represent external reality, but seeks to achieve its effect using shapes, colors, and textures.
Conscious Experience
The awareness of internal and external events or stimuli, encompassing thoughts, feelings, and perceptions.
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