CBSE Class 9 Science SA2 Sample Paper 2014 (1)

Can i get SA2 CBSE Science Papers with its Solutions
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2 3 5 8 13 _ what comes in the next block
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as 2+3= 5 and 5+8=13 so, 13+8=21
   therefore 21 is the ans
 
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what is atom ??
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an atom is the smallest particle of an element that can exist independently and can retain all its chemical propeties
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An atom is the simplest particle of matter .. It can not be broken down to future simpler particle, still retains all the chemical properties of the substance.
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Atom is the smallest particle of an element that cannot be further divide and indivisible.
  
      An atom is is the smallest particle of that can take part in chemicals. Atom is very-very small in size the size of an atom is individuated by its radius is called the atomic radius is measured in Nanometer. 
                                                                                                            109nm
      
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Atom is the tiny particle of matter which takes part in chemical reactiob
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21 Wii come in next block
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An atom is the smallest paticle pf element.
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