Metals lose/gain electrons to form positive
nonmetals lose/gain electrons to form negative

What are the percent by mass of copper in penny lab

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry