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Science

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Group #   number of electrons in outer level  
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Period #   number of energy levels it has  
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What’s in nucleus?   protons and neutrons  
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Where is electron cloud & what’s in it   around the nucleus & empty space with electrons  
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Electrons   close to nucleus & far from nucleus  
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What happens as you move down periodic table   closer electron is to nucleus the stronger the force (attraction). closer electrons are harder to remove, far electrons easier to remove  
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Noble gasses   called “stable” if outer shell is full  
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Energy Steps   how many can 1st & 2nd levels hold? first level can hold 2, and the second can hold 8  
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Ions   An atom that is no longer neutral because it has lost or gained an electron  
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Covalent Bond   The chemical bond that forms between nonmetal atoms when they share electrons.  
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Ionic Bond   The attraction that holds the ions close together, is a type of chemical bond  
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Chemical Formula   A combination of chemical symbols and numbers that shows which elements are present in an compound  
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Molecule   the neutral partical formed when atoms share electrons  
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Electron Dot Diagrams   a symbol to show how many electrons are in the outer energy level  
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