The de broglie equation predicts that the wavelength (in m) of a proton moving at 1000 m/s is what? (h=6.63 x 10^-34J•s; mass od a photon = 1.673 x 10^-24

Explanation:

from

de Broglie wavelength= h/ mv

substitute the values

joules= mass(kg) × acceleration (m/s^2) × distance(m)= kgm^2/s^2.

sorry I don't have my calc with me

answer:

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