Sandy soil is the parent rock that contails large amounts of quartz!!
Answer;
-Noble gases or Group 18 elements
Explanation;
A full valence shell is the most stable electron configuration. Group 18 elements or noble gases such as helium, neon, and argon, have a full outer, or valence, shell. Elements in other groups have partially-filled valence shells and gain or lose electrons to achieve a stable electron configuration.
They are extremely unreactive and do not form bonds with themselves. Solid helium is the the ultimate fine powder being monotomic.
Like 50 miles for the outermost layer which is called the LITHOSPHERE
A decline is a situation in which a security's price decreases in value over a given trading day and subsequently closes at a lower value than its opening price!!
