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Periodic Table OF Elements Crossword Puzzle Answer

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Periodic Table of Elements



        N O B L E G A S        
                    T          
            P       O     N    
            E       M     E    
        P   R       I     U   E
        E   I   A   C     T   L
        R   O   T   M     R   E
        I   D   O   A     O   C
    A T O M I C M A S S U N I T
    L   D   C       S     S   R
    K                         O
    A T O M I C N U M B E R   N
    L                          
    I                     N    
    E L E C T R O N C L O U D  
    A                     C    
C A R B O N G R O U P     L    
    T                     E    
    H A L O G E N         U    
    M                     S    
  P E R I O D I C L A W        
    T                          
    A L K A L I M E T A L      
    L           A              
              I S O T O P E    
                S              
                N              
          G R O U P            
                M              
                B              
                E              
              P R O T O N      
Across Down
1 unreactive nonmetals that are in group 18
8 the SI unit that expresses the masses of particles in atoms(amu)
9 the number of protons in an atoms nucleus
11 region in an atom where electrons are found
12 nonmetal with 4 valence electrons
13 very reactive nonmetals that have 7 valence electrons
14 repeating chemical and physical properties of elements change periodically with the elements numbers
15 elements in group one on the periodic table
17 atoms that have the same number of protons but a different number of neutrons
18 each vertical row on the periodic table
19 positively charged particles in the nucleus
2 the weighted average of the masses of all the naturally occuring isotopes of that element
3 'happening at regular intervals'
4 particles in an atom that have no charge
5 each horizontal row on the periodic table
6 negatively charged particle that moves around the atom in certain paths
7 smallest particle in which an element can be divided and still be the same substance
8 atoms that have 2 outer electrons
10 extremely dense positively charged part of an atom in the center of the atom
16 the sum of the protons and neutrons
 
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