The Nuclear Atom Quiz (Theory)

1. The   is unpredictable or it . 
2. The   of radiation is .
   and which is random .

 ( i )   and protons. 

( ii ) protons and . 

( ii ) age =   years .

( i )   

( ii ) The number of   and the number of electrons is not ,so the   do not cancel out.

( iii )  protons, but a different number of .

( i ) number =  

( i )   particles will be   by air after travelling a .

( ii ) Not all of the   emitted from the   will pass through the .

( iv ) Only the   particles that are   enough to the   are  back.
only a few are   back by a large  amount.
the nucleus in the   is .

Both atoms contain   and 1 proton.
  and protons carry   charges,so the   charged electron and the charged proton each other out.
The   have no charge. 

( a )   atomic   15, atomic number

( i ) Proton number =  

( ii ) nucleon number =   

  Isotopes are of the element with   numbers of .

 ( i ) number of electrons =   

( ii ) number of neutrons =   

( i ) number of atoms = x 10 ^ 7 .