The conversation between human and AI assistant.
[|Human|] Add 4 elements to the table.
[|AI|] Element  | Symbol | Atomic Number | Atomic Mass
----------------------------- 
H |   H    |       1      |    1.0
He |   He    |       2      |    4.0
Li |   Li    |       3      |    6.9
Be |   Be    |       4      |    9.0
B  |   B    |       5      |    10.8
[|Human|] 
Add 4 elements to the table.