IonicCovalent Bonding Notes Stable or Unstable An atom
Ionic/Covalent Bonding Notes
Stable or Unstable? An atom is only stable if it has a full valence shell If an atom is stable, it will not bond If an atom is not full, it will bond
Compounds are formed when 2 atoms of different elements bond together. Atoms bond to fill their valence shell An atom will bond with an many atoms as it takes to fill its outer shell Once the valence shell is full, that atom is stable
Types of Chemical Bonds There are two types of chemical bonds: 1. Ionic Bonds 2. Covalent Bonds
Ionic Bonds Ionic bonds exist between a nonmetal and a metal When two atoms bond ionically, they gain/lose electrons When an atom gains or loses an electron, it becomes an ion
Ions Group 1 2 It has 2 valence electrons. How many does it need to be stable? 8…so it can either lose 2 or gain 6. Which is Calcium is in group 2. Which other elements would lose 2 electrons? easier? 18 How many valence electrons does it have? 13 14 15 16 17 Losing 2…if it loses 2 electrons, it becomes positive 3 4 5 6 7 8 9 10 11 12
Ions Group 1 18 2 13 3 4 5 6 7 8 9 10 11 12 14 15 16 17
Ionic Bonds Properties High of Ionic Compounds melting point Good conductor of electricity Solid at room temperature
Covalent Bonds Covalent bonds exist between NONMETAL and NONMETAL. Example: Covalent Shared atom. H 2, H 2 O, NO 3, CH 4 bonds SHARE electrons don’t belong to either
Covalent Bonds Properties Low of Covalent Compounds melting point Poor conductor of electricity Liquid or Gas at room temperature
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