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Periodic table

Reality Stewart

1   2           3  
   
   
4 5           6  
  7                  
8                  
   
9 10                          
      11
    12     13          
14                          
    15    
    16 17              
         
18                  
     
  19          
 
20          

Across
1.usually dull in appearance, poor conductors of heat and electricity,
4.the same vertical column of the periodic table; also called a group
7.elements that have characteristics of metals and nonmetals
8.equal to the atomic number
10.chart of the elements showing the repeating pattern of their properties
12.orbiting the nucleus in numbers equal to the atomic number
14.sum of the number of neutrons and protons in an atomic nucleus
17.an element that varies by the number of neutrons in the nucleus.
18.In the nucleus of an atom it is stable
19.horizontal row of elements in the periodic table
20.shiny or metallic luster, good conductors of heat and electricity
Down
2.one of the elements of group 18 of the periodic table
3.has mass, occupies a volume, and flows to adopt the shape of its container.
5.the number of protons in the nucleus of an atom
6.can be either compressed or expanded to fill an infinite volume.
9.has a unique atomic number on the periodic table.
11.form of matter which has a definite shape and volume
13.containing two or more different atoms bound together.
15.smallest unit of matter that can exist of an element
16.one of two or more atoms with the same atomic number

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