Which of the following is true regarding the transition elements?
2 answers:
Answer: Option (A) is the correct answer.
Explanation:
Transition elements are the elements that have incompletely filled d-orbitals. Their general electronic configuration is ns (n-1)d.
For example, Ti has atomic number 22 and its electronic configuration is .
Due to similar energies in ns and (n-1)d orbitals electrons can be easily transferred. This causes transition metals to show variable oxidation states.
Thus, we can conclude that it is true regarding the transition elements that multiple oxidation states resulting from the involvement of d electrons in bonding is a characteristic of transition elements.
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Taking into account the definition of percentage composition, the percent composition of potassium iodide in this sample is 0.017%.
<h3>Definition of percent composition </h3>The Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.
To calculate the percentage of composition, it is necessary to know the mass of the element in a known mass of the compound.
<h3>Percentage Composition in this case</h3>In this case, you know that a 0.51 kg (or 510000 mg, being 1 kg= 1000000 mg) solution contains 87 mg of potassium iodide.
Dividing the mass amount of potassium iodide present in the compound by the mass of the sample and multiplying it by 100 to obtain a percentage value, the percentage composition of potassium iodide is obtained:
<u><em>percentage composition of potassium iodide= 0.017%</em></u>
Finally, the percent composition of potassium iodide in this sample is 0.017%.
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