The earths outer core's most abundant elemant is silicon. :)
yes.
Yes, copper is an element!
Gold is the element "Gold".
One element would be Iron
Each element is made of a specific atom
It is about nickel element. It is in the d block.
No. salt water is salt water. it already has salt in it
Salt water
Salt water is denser than fresh (not salt) water.
By mass Oxygen
there is salt in salt water and little salt in fresh water