The first hint to crack the puzzle "The first particle __ was invented in 1911" is:

It is a word which contains 8 letters

The second hint to crack the puzzle "The first particle __ was invented in 1911" is:

It starts with letter d

The third hint to crack the puzzle "The first particle __ was invented in 1911" is:

It ends with letter r

Looking for extra hints for the puzzle "The first particle __ was invented in 1911"

Click on any empty tile to reveal a letter

The answer for the puzzle "The first particle __ was invented in 1911" is: