A metal surface is known to have a work function of 7.75 eV. If an electron was emitted from the surface of the metal at a speed of 5.45X106 m/s, what was the wavelength, in nm, of the photon used?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease