Answer:
₈₈Ra²²⁶ → ₈₆Rn²²² + ₂He⁴ + energy
Explanation:
Alpha beta and gamma radiations are the examples of ionizing radiations.
Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles having two proton and two neutrons. It is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4 and atomic number less than 2 as compared to parent atom.
For example:
₈₈Ra²²⁶ → ₈₆Rn²²² + ₂He⁴ + energy
Properties of alpha radiation:
Alpha radiations can travel in a short distance.
These radiations can not penetrate into the skin or clothes.
These radiations can be harmful for the human if these are inhaled.
These radiations can be stopped by a piece of paper.
Another example:
₉₂U²³⁸ → ₉₀Th²³⁴ + ₂He⁴ + energy
The reaction above is illustrated in details in the file attached, where I used CHEMDRAW program to draw the compounds included compound (A), and illustrate the reaction, Please find the attachment.
The correct answer is reaction 2 most likely occurred in their experiment.
So the given two reactions are as follows:
1) Au³⁺(aq) + Co(s) --> Au(s) + Co³⁺(aq)
2) 2Au³⁺(aq) + 3Co(s) --> 2Au(s) + 3Co³⁺(aq)
Mass of Co = 6.087 g
Molar mass of Co = 58.933 g/mol
Moles of Co = = 0.1032
Mass of Au = 13.572 g
Molar mass of Au = 196.967 g/mol
Moles of Au = = 0.069
Now based on reaction 1) the molar ratio between Co and Au is 1:1
So as per this reaction 0.1032 moles of Co would produce 0.1032 mole of Au
Again based on reaction 2) the molar ratio between Co and Au is 3:2
So as per this reaction 0.1032 moles of Co would produce mole of Au
or, As per the second reaction 0.1032 moles of Co would produce 0.0688 moles of Au
The electromagnetic spectrum of an element is not limited only to the visible region of the spectrum.
<h3>What is an electromagnetic spectrum?</h3>
An electromagnetic spectrum is a range of frequencies and wavelengths into which an electromagnetic wave is distributed into.
In Science, the electromagnetic spectrum consist of the following types of energy from highest to lowest frequency and shortest to longest wavelength:
In this context, we can infer and logically deduce that the electromagnetic spectrum of an element is not limited only to the visible region of the spectrum.
Read more on electromagnetic spectrum here: brainly.com/question/23423065
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