How Many ¹⁴C Atoms Are in a Charcoal Sample That

question 121

Multiple Choice

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

• A)2.9 × 10⁷ atoms
• B)8.0 × 10^-7 atoms
• C)1.4 × 10¹⁴ atoms
• D)1.5 × 10¹³ atoms
• E)6.02 × 10²⁰ atoms

---

Definitions:

Biconditional

A logical connective indicating a statement in which two conditions are both necessary and sufficient for each other.

Disjunctions

Logical operators that represent the relationship "or" between two elements, propositions, or sets, implying that at least one of the elements is true.

Negation

In logic, negation refers to the operation of changing a statement's truth value from true to false, or vice versa.

Disjunction

A logical operation that yields true if at least one of its operands is true.