2.) Which element has the most occupied principle energy levels? A) C B) Cl C) Kr D) He
3.) Which element is nonreactive? Why? A) K B) Na C) F D) Ne
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Nov 153:07 PM 1 Trends in Metal and Nonmetal Reactivity 2016.notebook January 06, 2017
Metallic and Nonmetallic Character
The most metallic elements are in the bottom left hand corner of the periodic table.
The most nonmetallic elements are in the top right hand corner of the periodic table.
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Nonmetal reactivity decreases down a group because the nucleus' ability to gain more valence electrons weakens due to more nuclear shielding.
Nov 172:58 PM 2 Trends in Metal and Nonmetal Reactivity 2016.notebook January 06, 2017
For Metals: the most reactive metals are those that can lose their valence electrons the most easily.
Francium is the most reactive metal.
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The most reactive nonmetals are those that can most easily gain valence electrons.
Fluorine has the highest electronegativity and the smallest atomic radius therefore it gains valence electrons the most easily.
Fluorine is the most reactive nonmetal.
Nov 172:54 PM 3 Trends in Metal and Nonmetal Reactivity 2016.notebook January 06, 2017 Reactivity of metals
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Why don't the noble gases have electronegativity values and the largest first ionization energies?
Nov 172:58 PM 4 Attachments