Statistics for Category Elimination - Elements

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Group	#	Category	✓	% Correct
Green	79	Elements ending in "ium"	✓	100%
Green	26	... with an atomic number below 50	✓	95%
Blue	59	Elements discovered before 1850	✓	85%
Purple	104	Elements with a 2-letter symbol	✓	84%
Orange	38	Elements which are transition metals	✓	80%
Blue	20	... with an atomic number above 49	✓	74%
Green	9	... in the 4th row of the Periodic Table	✓	67%
Blue	8	... with at most 6 letters in its name	✓	64%
Orange	13	... containing the letter A	✓	57%
Green	2	... whose symbol is a single letter	✓	51%
Purple	29	... which are Actinides or Lanthanides	✓	46%
Green	1	... with 9 letters in its name	Potassium	44%
Orange	5	... with an odd atomic number	✓	43%
Purple	9	... with 10 or more letters in its name	✓	40%
Purple	4	... which was discovered after 1945	✓	36%
Blue	2	... in the 5th row of the Periodic Table	✓	34%
Orange	3	... which was discovered after 1800	✓	25%
Purple	1	... and not named after a person	Californium	24%
Blue	1	... whose symbol is a single letter	Iodine	21%
Orange	1	... which does not end in "dium"	Tantalum	11%