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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
1408248
109923
2

jan 1, 1897 -

Description:

Modified cathode ray tubes were used to discover the positively charged proton.

Added to timeline:

2 Aug 2018
0
0
368
Development of atomic theory

Date:

jan 1, 1897
Now
~ 127 years ago
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