Francium is not the most radioactive

Radioactivity is measured in how quickly it decays, and there is a specific unit for the amount of particles being emitted.

as far as we know all of the synthetic elements from Meitnerium to Ununoctium are extremely radioactive from half lives of 1 minute to Ununseptium's 5 milliseconds

Francium Isotopes have a half live of between about 4(1/2) minutes (Fr-221) and 22 minutes (Fr-223)

Francium-223 is the only naturally occurring isotope, all others are synthetic, it is the second most rare element after Astatine, it occurs in some Uranium and Thorium ores and there is an estimated 20-30 grams of it at any time in the earth's crust. Its melting point is not very specific, and varies between 22 and 27 degrees Celsius but since radioactive elements give off heat it would most certainly be a liquid, it is largely unknown because of its rarity and radioactivity, and has a very low electromagnetivity of .7

There are 34 known isotopes of francium ranging in atomic mass from 199 to 232. Francium has seven metastable nuclear isomers. Francium-223 and francium-221 are the only isotopes that occur in nature, though the former is far more common.

Francium-223 is the most stable isotope with a half-life of 21.8 minutes, and it is highly unlikely that an isotope of francium with a longer half-life will ever be discovered or synthesized. Francium-223 is the fifth product of the actinium decay series as the daughter isotope of actinium-227. Francium-223 then decays into radium-223 by beta decay (1149 keV decay energy), with a minor (0.006%) alpha decay path to astatine-219 (5.4 MeV decay energy).

Francium-221 has a half-life of 4.8 minutes. It is the ninth product of the neptunium decay series as a daughter isotope of actinium-225. Francium-221 then decays into astatine-217 by alpha decay (6.457 MeV decay energy).

The least stable ground state isotope is francium-215, with a half-life of 0.12 μs. (9.54 MeV alpha decay to astatine-211): Its metastable isomer, francium-215m, is less stable still, with a half-life of only 3.5 ns.

Only 20,000 synthetic atoms of Francium have been created. It can be synthesized through the Nuclear Reaction of

197Au + 18O --> 210Fr + 5 n

The future synthetic element that of which will sit underneath it is called Ununennium and has 119 protons which will start the theoretical G block

*Gasp*

[/topic rape]

You know, you could have just linked him to the wiki article you recited.

Also, radioactivity is not only measured by frequency of radiation (half-life), but also by volume of particles released (or absorbed). Think rads, rems, or grays.

HolyExLxF

I actually pulled out my Chemistry Note book and my 82nd Edition Chemistry Handbook, which I need 2 hands to carry and lift for what ever reason being called a handbook, and then copypasta'd it all

ohh... G block makes me shiver...
Just thinking about it is awesome....

You aren't fooling anyone.

HolyExLxF
hence the term Copypasta

I didn't trust wikipedia for a lot of its information

all I have to do it line up wikipedia with the 82nd edition book and then CTRL C then V

Regardless, you could have simply linked him to the page or provided a more concise answer without seeming like a complete tool in proving someone wrong.

Edit: Also, I apologize; your answer made it seem like you copied your handbook, not the wiki article.