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alukav5142 [94]

3 years ago

7

What is the relationship between events and patterns?

2 answers:

MAXImum [283]3 years ago

8 0

Events that happen over and over create/become a pattern

earnstyle [38]3 years ago

6 0

Answer:

events that happen over and over form a pattern

Explanation:

An event is the occurrence of something. If an event occurs over and over again following some sort of order the order is known as the pattern. The pattern is the overall structure that an event follows. Without a number of events there is not pattern. However, an event can occur without a pattern. The relationship among events is called a pattern

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3 years ago

An interpenetrating primitive cubic structure like that of CsCl with anions in the corners has an edge length of 664 pm. If the

san4es73 [151]

Answer:

the ionic radius of the anion $r^- = 312.52 \ pm$

Explanation:

From the diagram shown below :

The anion $Cl^-$ is located at the corners

The cation $Cs^+$ is located at the body center

The Body diagonal length = $\sqrt{3 \ a }$

∴ $2 \ r^+ \ + 2r^- \ = \sqrt{3 \ a} \\ \\ r^+ +r^- = \frac{\sqrt{3}}{2} a$

Given that :

$\frac{r^+}{r^-} =0.84$ (i.e the ratio of the ionic radius of the cation to the ionic radius of

the anion )

$0.84r^- \ + r^- \ = \frac{\sqrt{3}}{2}a \\ \\ 1.84 r^- = \frac{3}{2}a \\ \\ r^- = \frac{\sqrt{3}}{2*1.84}a$

Also ; a = 664 pm

Then :

$r^- = \frac{\sqrt{3} }{2*1.84}*664 \ pm\\ \\ r^- = 312.52 \ pm$

Therefore, the ionic radius of the anion $r^- = 312.52 \ pm$

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