G7 (U1,2)
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Complete: In order to move from the K level to the L level, an electron needs to absorb energy equal to .........................
the difference in energy between the K and L levels
Complete: The atomic number of an atom of an element that contains 3 electrons in in "M" energy level is .......................
13
Write the symbols of : Lead, Gold, Helium
Pb, Au, He
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