Test your knowledge
1. What is the insertion depth for magnesium compared to that for iron?
a) 2.0 times greater,
b) 5.2 times greater,
c) 2.5 times greater.
2. Assign the metals of gold, iron, magnesium, copper, aluminium and lead to the following
drawing.
a)
b)
c)
d)
e)
f)
39