Which element is a metalloid? Check all that apply. selenium (Se) polonium (Po) silicon (Si) iodine (I) tin (Sn) antimony (Sb) p
hosphorus (P)
2 answers:
The metalloids are highlighted in the table.
Of the elements in the question, the following are metalloids...
<span>antimony (Sb)
</span><span>silicon (Si)
</span><span>polonium (Po)
</span>
Of the elements in the question, the following are metalloids...
<span>antimony (Sb)
</span><span>silicon (Si)
</span><span>polonium (Po)
</span>
Answer: Polonium (Po), Silicon (Si), Antimony(Sb)
Explanation: Metalloids are the elements which exhibits some properties of both metals and non-metals. They are generally called as semi-metal. There are in total 7 metalloids in whole periodic table. They are:
Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Telurium (Te) and Polonium (Po).
From, the list and periodic table attached, it is visible that only Silicon, Polonium and antimony are the metalloids from the elements given.
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Taking into account the definition of percentage composition, the percent composition of carbon in this sample is 62.17%.
<h3>Percentage 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.
Then, the percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
In this case, you know:
- mass of solute= 46.63 g
- mass of solution= 75 g
Replacing:
Solving:
<u><em>percentage by mass= 62.17 %</em></u>
Finally, the percent composition of carbon in this sample is 62.17%.
Learn more about percent composition:
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