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Stack #102242

QuestionAnswer
Mendeleev first developer of the periodic table
how elements are arranged on the table by atomic number
number of groups on the table 18
number of periods on the periodic table 7
alkali metals group 1 most reactive
alkaline earth metals group 2
Halogens group 17
noble gases group 18/ non reactive
metalloids upper right corner of pt
negatively charged particle electron
proton positively charged particle in the nucleus
neutron neutrally charged particle in the nucleus
atomic number number of protons in atom
atmoic weight mass number
isotope atoms of the same element with same number protons different number neutrons
transition metals groups 3-12
inner trainsition metals bottom rows on periodic table
groups/families vertical columns on the periodic table
periods horizontal rows on periodic table
Created by: haylcarp
 

 



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