Naturally Occurring Element X Exists in Three Isotopic Forms: X-28

question 59

Multiple Choice

Naturally occurring element X exists in three isotopic forms: X-28 (27.979 u,90.64% abundance) ,X-29 (28.976 u,4.00% abundance) ,and X-30 (29.974 u,5.36% abundance) .Calculate the atomic weight of X.

• A) 29.64 u
• B) 28.13 u
• C) 28.99 u
• D) 29.83 u
• E) 27.15 u

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Definitions:

Large Intestine

The terminal part of the gastrointestinal tract, responsible for water absorption, and formation and excretion of feces.

Digestive System

The complex series of organs and glands responsible for the ingestion, digestion, and absorption of food and elimination of waste.

Trypsin

An enzyme produced in the pancreas that helps digest proteins in the small intestine.

Chymotrypsin

An enzyme located in the small intestine that digests proteins into smaller peptide fragments.