Light of wavelength 200.0 nm is incident on a metal plate with a threshold wavelength of 400.0 nm What is the energy of the incident photon in electron volts?
2.48 x 10 eV
C. 6.20 eV
IN
b. 0.161 eV
d. 3.10 eV
a.

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

Calculate the concentration of all species in a 0.165 m solution of h2co3.

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?