SCH3U Elemental Symbols, Fundamental Particles      Answers
1.
Complete this table:
Symbol  p+1 no e-1
Symbol  p+1 no e-1
11      
178O      
21      
3919K      
42He      
4019K      
52He       
23592U      
63Li       
23992U      
73Li      
23993Np      
168O      
23994Pu      


You'll need a copy of a periodic table for the following questions.
2. Give the numbers of neutrons, protons, and electrons in the atoms of each of the following isotopes

(a) radium-226
 

(b) carbon-14
 

(c) cesium-137 
 

(d) iodine-131
 
3. Write the symbol for the isotope of plutonium (Pu) with 146 neutrons. The atomic number of plutonium is 94.
 
4.  Write the symbols of the isotopes that contain the following.

(a) An isotope of silver whose atoms have 63 neutrons.
 

(b) An isotope of strontium whose atoms have 52 neutrons.
 

(c) An isotope of lead whose atoms have 126 neutrons.
 

 (d) An isotope of fluorine whose atoms have 9 neutrons.