Which Are Isotopes? an Atom That Has an Atomic Number

question 157

Multiple Choice

Which are isotopes? An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has

• A)an atomic number of 21 and a mass number of 42.
• B)an atomic number of 20 and a mass number of 40.
• C)22 neutrons and 20 protons.
• D)22 protons and 20 neutrons.

---

Definitions:

CCA Class

Refers to the classification of tangible property under the Canadian Capital Cost Allowance for purposes of tax depreciation.

Tax Rate

The cut of income taxed from individuals and corporations.

Book Value

The net value of a company's assets minus its liabilities, often used to determine a company's financial health.

Terminal Value

The estimated value of a business or project beyond the explicit forecast period, often assumed to have a steady growth rate.