What Particle or Nucleus X Is Needed to Complete the Following

question 53

Multiple Choice

What particle or nucleus X is needed to complete the following equation?
40
19 K ? $$0$$
$- 1$ e + X

• A)argon-20
• B)calcium-20
• C)argon-18
• D)potassium-40
• E)calcium-40

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Definitions:

Compounded Semiannually

Interest calculated twice per year, with the first period's interest being added to the principal before the second period's interest is calculated.

Strip Bond

A financial instrument obtained by separating the coupons from the principal of a bond, which then sells each part as a zero-coupon bond.

Semi-Annually Compounded

Pertaining to the interest calculation method where the interest is compounded and added to the principal amount twice a year.

Compounded Annually

The process of earning interest on both the initial principal and the accumulated interest from previous periods on an annual basis.