If an atom has become a positive ion, it has
A)
gained an electron or electrons.
B)
lost an electron or electrons.
C)
gained a proton or protons.
D)
gained a proton and an electron.
E)
lost a proton or protons.
Question 2
What is the nuclear radius of 90Sr?
A)
4.0 10-15 m
B)
1.2 10-15 m
C)
1.1 10-13 m
D)
5.4 10-15 m
E)
3.3 10-13 m
