3 years ago

Consider the elements bromine and chlorine; which element has a larger ionic radius?

Chemistry

2 answers:

Nikolay [14]3 years ago

6 0

Not 100% be Im pretty positve its Bromine

9966 [12]3 years ago

5 0

took the quiz, it is bromine

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2 years ago

Iron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 180 mg of iron-59, how much iron-59 is l

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2.79 mg iron-59 is left in the sample after 267 days.

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So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{44.5}\ days^{-1}$

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So,

$[A_t]=180\ mg\times e^{-0.0156\times 267}$

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$[A_t]=2.79\ mg$

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