One of the following is not a physical property of iron. Mark only one oval.
malleability
magnetism
rusting
color

Connect the whole numbers on the periodic table to indicate what they represent?

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

How many atomic mass units are equal to 1.672×10−24 g of protons?