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2 years ago

Why does radiation decrease over time?

1 answer:

8 0

Radiation decrease over time due to the concentration of radioactive atoms and the concentration decreases as radioactive particles are emitted (Option D).

<h3>What is radiation?</h3>

Radiation refers to the transmission of energy by means of subatomic particles that travel as waves.

Radioactive isotopes are also known as radioisotopes, which have unstable combinations of subatomic particles (i.e., neutrons or protons) in their atomic nuclei, and thus may emit alpha particles, gamma rays or beta particles.

Radioactive isotopes such as C14 lost (emit) energy per unit of time, which is known as radiation or radioactive decay.

In conclusion, radiation decrease over time due to the concentration of radioactive atoms and the concentration decreases as radioactive particles are emitted (Option D).

Learn more about radioactive isotopes here:

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Happy Holidays! :)

$\large\boxed{\text{Water.}}$

Looking at the information given in the description, the experiment is testing for the effects of the different salts on the growth of the plants.

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Select correct examples of linear molecules for five electron groups. Select correct examples of linear molecules for five elect

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Explanation:

Formula to calculate hybridization is as follows.

Hybridization = $\frac{1}{2}[V+N-C+A]$

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V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

So, hybridization of $BeCl_{2}$ is as follows.

Hybridization = $\frac{1}{2}[V + N - C + A]$

= $\frac{1}{2}[2 + 2]$

= 2

Hybridization of $BeCl_{2}$ is sp. Therefore, $BeCl_{2}$ is a linear molecule. There will be only two electron groups through which Be is attached.

Similarly, hybridization of $XeF_{2}$ is calculated as follows.

Hybridization = $\frac{1}{2}[V + N - C + A]$

= $\frac{1}{2}[8 + 2]$

= 5

Therefore, hybridization of $XeF_{2}$ is $sp^{3}d. Therefore, [tex]XeF_{2}$ is also a linear molecule. Though there are three lone pair of electrons present on a xenon atom and it is further attached with fluorine atoms through two electron pairs. Hence, there are in total five electron groups.

Thus, we can conclude that out of the given options $XeF_{2}$ is the correct examples of linear molecules for five electron groups.

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3 years ago

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