Brainliesttt which families of metals are not so reactive, which allows them to exist by themselves in nature?

The answers are:1. Noble Gases,

2. The closer the element is to the noble gases the less reactive it is.Hope this helps !!! :)

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.