Question: 108/47 Ag

Answer: 108 = mass number

47 = atomic number

Ag = element

Question: Atomic Number

Answer: number of protons and electrons in an element’s isotope.

ex. 108/47 Ag = 47 protons & 47 neutrons

Question: Mass Number

Answer: number of protons and electrons + number of neutrons in an element’s isotope.

ex. 108/47 Ag = 47 protons & neutrons, 108 - 47 = 61 electrons

Question: 1s^2 2s^2 2p^3 = arrows

Answer: [up, down] [up, down] [up, ] [up, ] [up, ]

don’t double up until have to

Question: atomic number =

Answer: (mass

% abundance)

Question: Atomic #, # of protons, & # of electrons =

Answer: same #