Answer: 8.3 or C
Eplanation: This is because a half life is 50 percent of a normal life so 50 percent divided by 6 is 8.3
[tex]8.3[/tex]% is the approximate decay rate of the element after the first day.
What is Radioactive decay ?
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles.
What is decay rate?
The rate of decay, or activity, of a sample of a radioactive substance is the decrease in the number of radioactive nuclei per unit time.
According to question, a radioactive element has a half-life of six days.
A half- life is [tex]50[/tex]% of a normal life.
So, the approximate decay rate of the element after the first day
[tex]=\frac{50}{6}[/tex]% [tex]=8.3[/tex]%
Hence, we can conclude that [tex]8.3[/tex]% is the approximate decay rate of the element after the first day.
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