Among the given isotopes of oxygen, identify the most stable isotope. oxygen-14, oxygen-16, oxygen-18. Concept Introduction: The stability of isotopes is based on their half lives. Longer the time required to decompose to half of initial concentration higher the stability. However, the half lives are not given here so we have to go with the rule of stability of isotopes as. For the elements with atomic number less than 20, the isotope will be stable if. n p = 1 Where, n is number of neutrons. p is number of protons.

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Synthesis of Dibenzalacetone [References] Draw structures for the carbonyl electrophile and enolate nucleophile that react to give the enone below. Question 1 1 pt Question 2 1 pt Question 3 1 pt H Question 4 1 pt Question 5 1 pt Question 6 1 pt Question 7 1pt Question 8 1 pt Progress: 7/8 items Que Feb 24 at You do not have to consider stereochemistry. . Draw the enolate ion in its carbanion form. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. ⚫ Separate multiple reactants using the + sign from the drop-down menu. ? 4

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Chapter 9, Problem 9.17P

Interpretation Introduction

Interpretation:

Among the given isotopes of oxygen, identify the most stable isotope.

oxygen-14, oxygen-16, oxygen-18.

Concept Introduction:

The stability of isotopes is based on their half lives. Longer the time required to decompose to half of initial concentration higher the stability.

However, the half lives are not given here so we have to go with the rule of stability of isotopes as.

For the elements with atomic number less than 20, the isotope will be stable if.

np=1

Where,

n is number of neutrons.

p is number of protons.

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