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Science Test 2

QuestionAnswer
atomic number number of protons in an atoms
isotopes are..? atoms whose nucleus contains an abnormal number of neutrons
Atomic Mass number P+N
Dmitri Mendeleev 1st person to classify elements into a chart
how did Dmitri Mendeleev classify his elements Atomic Mass
Henry Moseley classify elements according to Atomic number
Which is the modern day table that we use Henry Moseley
Periodic Law chemical and physical properties are periodic functions of their atomic number
number of columns 18 columns
number of special groups or families 8 families
Valence electron electrons found in the furthest electron field
Description of the left side very active metal solid; lose electron easily
Description of the right side very inactive gas ; gains electrons easily
Amount of energy needed to move the electrons increase going left to right
Metallic Left= Metallic Right= no metallic
Size of atom Left is small and right is big
Oxidation number of elctrons that an element will gain or lose 1,2,3,4,-1,-2,-3
Bromine elements that is liquid
Created by: bridget1995
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