Which pair shows the strongest and weakest intermolecular forces?
A) Br (s), Br (l)
B) Br (l), Br (s)
C) Br (s), Br (g)
D) Br (g), Br (s)

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.

Name the element in group 17, period 2. (periodic table)

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!