Atomic #, Mass #, Protons, Neutrons, Electrons

Practice for Unit 1 Benchmark #2

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Isotope
Atomic NumberMass Number
Protons
Neutrons
Electrons
beryllium-9
-18
8
aluminum-
14
-
25
34
-
35
29
arsenic-
41
-88
51
silver-104
-
83
56
-202
82
-14
6
-
8
7
-43
20
-
46
35