Boron Has Primarily Two Isotopes,one with an Atomic Mass of 11

question 75

Multiple Choice

Boron has primarily two isotopes,one with an atomic mass of 11 amu and another with an atomic mass of 10 amu.If the abundance of the boron atom with a mass of 11 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent,what would be the average mass of the boron atom?

• A)10.19 amu
• B)11 amu
• C)10 amu
• D)10.81 amu
• E)not enough information given

---

Definitions:

Unemployment Benefits

Payments made by authorized bodies to unemployed individuals on a regular basis to support them financially while they seek new employment.

Alfred Landon

A Republican politician known for being the Governor of Kansas and the GOP's 1936 presidential candidate against Franklin D. Roosevelt.

Republican Challenger

A candidate from the Republican Party who contests an election against the incumbent, often in the context of US politics.

Political Coalition

An alliance between different political parties or groups for achieving common goals or gaining political power.