What is an emission spectrum? A. The energy absorbed when an electron gains energy
B. The products created when an element is burned
C. The total amount of energy emitted by an element
D. The colors of light given off when an element loses energy

The number at the end of an isotope’s name is the number.

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.

What is a difference between a mixture of elements and a mixture of compounds