Anuclear reaction in which two light nuclei combine to form a more massive nucleus is called
(1) addition (3) fusion
(2) fission (4) substitution

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

Non renewable resources like petroleum eventually

Compare and contrast physical changes with chemical changes.