1.) How many photons are produced in a laser pulse of 0.643 J at 575 nm? 2.)A certain rifle bullet has a mass of 5.01 g. Calculate the de Broglie wavelength of the bullet traveling at 1649 miles per hour. Consult the table of physical constants as needed.
3.) What element forms an ion with an electronic configuration of [Ne] and a −2 charge?

A typical laser pulse used in MALDI is about 60 microjoules/pulse at 337 nm. At 337 nm the power is about 6 x 10^-19 J/photon. Doing the math suggests that of 10^14 photons are in a typical desorption pulse

Explanation:

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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