The frequency of a line in the emission spectrum of an atom indicates the amount of A
kinetic energy gained by the nucleus when heat energy is added to the atom.
B.
energy characteristically released when an electron drops to a lower energy state.
C.
energy released by the nucleus when heat energy is removed from the atom.
D.
charge characteristically lost when an electron drops to a lower energy state.

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

i think its 100

i hope this !

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally