22. Metals rarely lose electrons in chemical reacti(:ms because (A) their electron affinities are too high. (B) their ionic radii become too small. (C) their ionization energies are too small. (D) their size is too small. (E).their ionization energies are too high.

1. A beam of light with an intensity of 15 W is. incident on a copper plate (work function is7.43xl0-19 J). Electrons with a minimum wavelength of 3.75x10 －10 m are ejected from the surface of the copper. Calculate the frequency of the incident light. [Hint: Plank constant = 6.626 x 10－34J·s] (A)3.7lx1015Hz (B) 3.71 x 1016 Hz,(C) 3.71 x 1017 Hz,(D) 3.71 x 1018Hz(E) none of above

22. Metals rarely lose electrons in chemical reacti(:ms because
(A) their electron affinities are too high.
(B) their ionic radii become too small.
(C) their ionization energies are too small.
(D) their size is too small.
(E).their ionization energies are too high.

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