Energy required to remove a core electron
energy required to remove a valence electron
10)
The element sodium has an atomic number of 11 and a mass number of 23. How many protons, neutrons, and electrons does one
atom contain?
11p. 11e , 12nº
Eliminate
11p*. 12.11n
11pt. 11e, 23°
D)
12p. 12e, 11nº
The atomic number, or
number is the described as the number of
number, is the described as the number of
in the nucleus of an chemical element