Periodic Table

It's elemental
No need to be judgmental or accidental
Use your mental methodically
Periodically set an electron free
Now I’m charged positively
It’s me Mr. B-E-A-R-D
So there's 90 elements
That occur naturally
And radioactive decay
The rest are made artificially
Mendeleev through the scientific method
Had realized the heart of chemistry
He knew undiscovered elements existed
To fill the gaps like he had predicted
Other scientists persisted
To keep the table unrestricted