L 10) A pure sample of an element was vaporized and injected into a mass spectrometer
and the data was plotted on the graph below. The mass values for the isotopes
were found to be: A–50 (49.946 amu), A-52 (51.941 amu), A-53 (52.941 amu),
and A-54 (53.939 amu). Find the average atomic mass and identify the element.

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.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol