Chem Project Part 2

Chem Project Part 2
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  • Do atoms have energy levels?  I always thought that was like how tired people are!
  • No?  That means if an atom is in ground state or its excited state.  Ground state is the lowest energy level of an atom.  An excited state is when an electron jumps from its ground state to a higher orbital further away from the nucleus.     
  • Also, isn't the periodic table broken down in to different categories?
  • Yes.  They are: metals, nonmetals, noble gases, and transition metals.  Each one of those categories has different characteristics that the elements have those characteristics, hence why they are in those categories.   
  • I don't get when she talks about the oxygen number of an atom. I guess that's how many atoms of oxygen are in the compound?
  • I think you mean the oxidation number of an atom.  That number tells you how many electrons are lost or gained by the atom when it is in a compound.  Also oxygen isn't in all the compounds?
  • Also on the quiz, there is electron affinity right? And that means how much energy is released when a neutral atom is added to an electron.  
  • Right!  Don't forget electron negativity as well.  That is how likely an atom is to attract a pair of bonding atoms to its self. 
  • Isn't an ion the same thing as an atom?
  • What? No.  An ion is an electrically charged atoms.  A Cation is positive and an anion is negative,  Also don't forget ionic bonds which are bonds between two oppositely charged atoms.  They form when one atom gives up at least one atom to the other atom. 
  • I forgot that molecules were on the quiz!  But I know that in a covalent bond the bond involves the two atoms sharing electrons.   
  • A molecule is the smallest part of a chemical compound but it as all of the characteristics of that element.  Good luck! 
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