Why was a 7.2 magnitude earthquake with an epicenter in Northern Mexico felt over 100 miles away in the southern part of California?

Classify this reaction: 2al+n2-> aln.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

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