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The periodic table has undergone some changes since it was first introduced. List three ways the modern periodic table differs from the one first published by Mendeleev in 1869.
answered
Oct 22, 2017
Chemistry
high-school
1
vote
140k
views
What is the value of |−32|?
answered
Jul 19, 2017
Mathematics
middle-school
6
votes
203k
views
Why do automobiles rust faster in wet climates than in drier climates?
answered
Jun 4, 2016
Physics
middle-school
3
votes
116k
views
|p|<1.3? how do I find this?
answered
Sep 26, 2015
Mathematics
high-school
1
vote
93.2k
views
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