i need to need to no these ?

9.Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a(an) of francium
11 A flight simulator that helps astronauts prepare for a shuttle launch is an example of a(an) flight test .
19.How do you know that magnesium is the more metallic element in the compound magnesium oxide, MgO?

Question

i need to need to no these ?

9.Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a(an) of francium
11 A flight simulator that helps astronauts prepare for a shuttle launch is an example of a(an) flight test . 
19.How do you know that magnesium is the more metallic element in the compound magnesium oxide, MgO?