help with atom and atomic

Question

1.  when the electrons of an atom absorb energy

 

a.  they move further from the nucleus

b.  they increase their potential energy

c.  their quantum number increases

d.  all of these

 

 

2.  the atomic spectrum of an element is

 

a.  made up of all frequencies of vicible light

b.  produced by energized neutrons

c.  unique for that elemetn

d.  all of these

 

thanks

Answer 1

When we look at the microscopic level of the atom, we think of shells (quantum number n=1,2,3...) in which the electron can be in, with the right amount of energy. If an electron has enough energy, it can move to higher quantum levels. Being at these higher levels gives the electron more energy, because when the electron moves back to a lower level, a proportional amount of energy is released from the atom. So for the first question, all of the answers are correct.

 

For the second question, if we think of the mass spectrometer experiment, we know that the atomic spectrum of an element is unique for each element.