An electron is ejected from a metal with a velocity 6.70 x 105 m/s. If the metal has a threshold frequency of 1.50 x 1015 Hz, what was the wavelength of the incident

photon?

What is the most stable monatomic ion formed from nitrogen

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)