10 minutes maximum! Can you do it in 5?

16: The following questions are about ionising radiation.
Which type of radiation... 

1. ...can only travel a few centimeters in air? 

2. ...is only stopped by thick lead?


3. ..has a negative charge? 

4. ..has a mass of 4 units and a charge of +2? 

5. ..has no charge and no mass? 

6. ...can pass through paper? 

7. In this decay equation, what are the missing numbers x and y?

14 
C 

14 
N 
+ 
y 
ß^{} 
6 
x 
1 
 A. x=5, y=1
 B. x=5, y=0
 C. x=7, y=1
 D. x=7, y=0
 
8. When Uranium decays it creates Thorium (Th) and emits an alpha particle(α).
Which one of the following equations correctly shows the balanced equation? 

A. 
235 
U 

231 
Th 
+ 
4 
α 
92 
90 
2 
B. 
235 
U 

233 
Th 
+ 
2 
α 
92 
88 
4 
C. 
235 
U 

231 
Th 
+ 
4 
α 
92 
92 
2 
D. 
235 
U 

231 
Th 
+ 
2 
α 
92 
90 
4 
 
9. Which of these is the correct notation for gamma radiation?
 
10. An oxygen isotope emits a ß particle. This means ..
 A. ..the mass (nucleon) number will decrease by 1, the atomic number will increase by 1.
 B. ..the mass (nucleon) number will decrease by 1, the atomic number will stay the same.
 C. ..the mass (nucleon) number will stay the same, the atomic number will increase by 1.
 D. ..the mass (nucleon) number will stay the same, the atomic number will decrease by 1.
 
