CAN SOMONE HELP WITH THESE QUESTIONS

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

CAN SOMONE HELP WITH THESE QUESTIONS

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?

anonymous · Answer

sorry