How are magnets made? what raw materials are required?

How will the emission of an alpha particle affect the atomic number of an atom

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.