The finding that electrons occupy discrete orbits in an atom was ...

[BRWH]

The finding that electrons occupy discrete orbits in an atom was first explained by the
 
  A) quantization of electric charge.
  B) small mass of the electron.
  C) circumference of each orbit being an integral multiple of an electron wavelength.
  D) none of the above

Question 2

When the nucleus of an atom emits an alpha particle, the atom's atomic number
 
  A) decreases.
  B) remains unchanged.
  C) increases.

[sarahccccc]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: A

[BRWH]

TYSM

[sultana.d]

Gracias!