An Element's Most Stable Ion Forms an Ionic Compound with Chlorine

question 25

Multiple Choice

An element's most stable ion forms an ionic compound with chlorine having the formula XCl₂. If the mass number of the ion is 89 and it has 36 electrons, what is the element and how many neutrons does it have?

• A) Sr, 51 neutrons
• B) Kr, 55 neutrons
• C) Se, 55 neutrons
• D) Kr, 53 neutrons
• E) Rb, 52 neutrons

---

Definitions:

Sales

The activity or business of selling products or services.

Equation

A mathematical statement that asserts the equality of two expressions, typically involving variables and constants.

Coefficient Of Correlation

A statistical metric that assesses the intensity of the association between the relative changes of two variables.

Regression Equation

An equation that describes the relationship between independent variables and a dependent variable, often used to predict the latter from the former.