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3 years ago

why does having a higher first ionization energy and high electronegativity make a nonmetal to be very reactive?

Chemistry

1 answer:

MAXImum [283]3 years ago

6 0

Answer:

A higher electronegativity means that the element/atom has a very strong tendency to attract shared electrons, making it very reactive. Higher first ionization energy only makes the nonmetal less reactive, since the pull on the valence shell is closer to the nucleus and you need more energy to pluck the electron out.

Perhaps you meant lower first ionization energy?

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The decay of the isotope iodine-131 is first-order with a rate constant of 0.138 d−1. All radioactive decay is first order. How

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Answer:

16.7 days

Explanation:

We are given;

A radioactive isotope Iodine-131`

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The percent decayed is 90%

We are suppose to calculate the number of days for the decay.

Using the formula;

$In(\frac{[A_{0}]}{[A]})=kt$

Where, $[A_{0}]$ is the initial concentration and $[A]$ is the new concentration.

Rearranging the formula;

$t=In(\frac{[A_{0}]}{[A]})/k$

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Therefore;

$t=In(\frac{[x]}{[0.10x]})(\frac{1}{0.138})$

$t=In(\frac{[1]}{[0.10]})(\frac{1}{0.138})$

$t=In(10.0)(\frac{1}{0.138})$

$t=(2.3026)(\frac{1}{0.138})$

$t=16.685$

Time = 16.7 days

Therefore, it will take 16.7 days for 90% of I-131 to decay to Xe-131

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4 years ago

Chlorine is much more apt to exist as an anion than is sodium. this is because __________.

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