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Chapter 24: Q24.92P (page 1105)

What is the cosmic importance of unstable ${}^{8}{Be}$ ?

Short Answer

Expert verified

${}^{8}{Be}$ is an activated complex that fuses with alpha particles to form atoms with bigger nuclei.

Step by step solution

01

Definition of Concept

Electronegativity: An atom's chemical behavior in which it attracts the shared electron pair to itself is known as electronegativity. As the number of energy levels grows larger, electronegativity decreases.

02

Find the cosmic importance of unstable Be8

In reactions, the unstable ${}^{8}{Be}$ nuclei serve as activated complexes. This unstable nuclei is created when alpha particles fuse at a star's core. Different atoms such as ${}^{12}{C,}^{16} {O,}^{20} Ne$ , and ${}^{24}{Mg}$ can form when ${}^{8}{Be}$ collides with other alpha particles.

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Most popular questions from this chapter

What volume of radon will be produced per hour at STP from 1.000 g of mass of ${}^{226}R a (t_{1 / 2} = 1599 y r; 1 y r = 8766 h;$ one ²²⁶Ra atom =226.025402 amu)

The oxidation of methanol to formaldehyde can be accomplished by reaction with chromic acid:

${6H}^{+} {(aq)+3CH}_{3} {OH(aq)+2H}_{2} {CrO}_{4} (aq) \to {3CH}_{2} {O(aq)+2Cr}^{3+} {(aq)+8H}_{2} O(l)$

The reaction can be studied with the stable isotope tracer_{$^{18} O$}and mass spectrometry. When a small amount of CH318OH is present in the alcohol reactant, ${CH}_{2}^{18} O$ forms. When a small amount of $H_{2} {Cr}^{18} O_{4}$ is present, ${H_{2}}^{18} O$ forms. Does chromic acid or methanol supply the O atom to the aldehyde? Explain.

Plutonium- $239$ $(t_{1/2} {=2.41×10}^{4} yr)$ represents a serious nuclear waste hazard. If seven half-lives are required to reach a tolerable level of radioactivity, how long must $^{239} Pu$ be stored?

The ${}^{80}{Br}$ nuclide decays either by decay or by electron capture.

(a) What is the product of each process?

(b) Which process releases more energy? (Masses of atoms: ${}^{80}{Br}$ = $79.918528$ amu; ${}^{80}{Kr}$ = $79.916380$ amu; ${}^{80}{Se} = 79.916520$ amu; neglect the mass of electrons involved because these are atomic, not nuclear, masses.)

Question:What is the reaction order of radioactive decay? Explain.

See all solutions

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