QUESTION?There are only 118 elements on the periodic        table, but we have many more substances than that on earth? Ho...
REACTIVITY:Each element will only react with specific  other elements. They must benefit from  the bonding, otherwise it w...
BONDING:• In order for an atom to bond it must  collide with another atom.• So the only electrons that will interact  will...
VALENCE ELECTRONS:• Electrons in the outermost energy level  of the atom.• Important because…they are the  electrons invol...
Element:                                       ChlorineElement:Hydrogen                               Valence #:          ...
DO YOU SEE A PATTERN???What do all 4 elements have in common?           1 Valence Electron!Where are they found in the per...
GROUP 2 ELEMENTS: Be        Mg
Reactivity and valence electrons
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Reactivity and valence electrons

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Reactivity and valence electrons

  1. 1. QUESTION?There are only 118 elements on the periodic table, but we have many more substances than that on earth? How to do we get so many different substances? What do we call it when two atoms are “stuck” together?
  2. 2. REACTIVITY:Each element will only react with specific other elements. They must benefit from the bonding, otherwise it won’t happen! Alkali Metal Reactivity
  3. 3. BONDING:• In order for an atom to bond it must collide with another atom.• So the only electrons that will interact will be the ones on the __________ of OUTSIDE the atom.
  4. 4. VALENCE ELECTRONS:• Electrons in the outermost energy level of the atom.• Important because…they are the electrons involved in bonding!
  5. 5. Element: ChlorineElement:Hydrogen Valence #: 7Valence #: 1 Element: Lithium Valence #: 1 Element: Sodium Valence #: 1
  6. 6. DO YOU SEE A PATTERN???What do all 4 elements have in common? 1 Valence Electron!Where are they found in the periodic table? Group 1! What RULE can we make based on this information? Group # = # of Valence electrons
  7. 7. GROUP 2 ELEMENTS: Be Mg

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