<h2><u>Answer</u> :</h2>
The most appropriate option is :

Since, they are the most abundant elements found in Earth's Crust.

If you meant the word silicon then yes, silicon is a semiconductor and its ability to conduct gets better as the temp. rises
Answer:
They are multilayered
Spacesuits provide protection from radiation and offer normal air pressure inside
Explanation:
Answer: The volume of
required is 25.0 ml
Explanation:
According to the neutralization law,
where,
= basicity
= 1
= molarity of
solution = 2.00 M
= volume of
solution = 50.0 ml
= acidity of
= 1
= molarity of
solution = 4.00 M
= volume of
solution = ?
Putting in the values we get:
Therefore, volume of
required is 25.0 ml
I think it would be Bromine and Mercury, hope that helps