periodic table/element questions...?

Question

1.) what is the most chemically reactive non-metal?
2.) which element is a metalloid by location but has properties that suggest its a light metal? (Al?)
3.) what is the most metallic element?
4.) What is the heaviest element on the planet?

im pretty much going off what my hmwk sheet says...haha...um...i'm guessing metallic means 'shiney' ?

and im only using groups 1,2,13,14,15,16,17,18.
periods 1-5 on all the groups except 15-18, which only use periods 1-4.

If that made any sense...great
if i didn't...just answer the questions =)
lol thanks guys

Answer 1

1) Fluorine
2) Aluminum
3) Lithium
4) Uranium

Answer 2

Here are my best attempts:

1) It depends how you define "chemically reactive." The argument can be made that Fluorine fits this definition in that it has the highest electronegativity. It could be said that Chlorine is the one that fits the definition with the highest electron affinity. My best guess is a safe one: Hydrogen. It is chemically reactive not only in its abundance but in its mass (or lack thereof). That being said, there are many rare non-metals which would be far more potent; just look down on the table.

2) Aluminum is generally never considered to fit in the metalloid category. My best guesses would be Boron (because it is "light"), Selenium (because it is the non-metal that looks by far the most like a metal), or Antimony (because of its general label of "semi-metal").

3) Define metallic. If metallic is the mean atomically stable, then the answer is the most stable of them all - Iron. If metallic is to mean conductive then the answer may well be Copper. There are too many properties of metallic to define one as any more metallic than another. It's like saying "which of the seashells is the most like a seashell?"

4) The most common answers you're going to get from this question are Lead, Bismuth, Thorium, and Uranium. Lead is an answer because it is technically the most "abundant" of the ridiculously heavy metals. The reason is that the nucleogenesis process of slow neutron capture (the S-process) effectively terminates at Lead, because the next ones are all radioactive. Uranium (U-238) could also be what you're looking for because it is indeed heavier than the other ones and it is indeed found on Earth. That being said, there are a number of heavier elements that are not nearly as abundant but are technically heavier. Also, artificial elements whose half-lives prevent them from existing longer than a few milliseconds are significantly heavier.

EDIT: Lead-208 is indeed the heaviest stable element.

Answer 3

The heaviest element would be the last one on the periodic table that is naturally occuring: "Nobelium is a radioactive "rare earth metal" named after Alfred Nobel who discovered dynamite." It's #102 on the Periodic Table. Beyond that, #'s 103 and up, are artificially made elements slammed together in particle accelerators and do not exist "on the planet."
I don't know enough about chemistry to answer the other three, but check the URL there and read all the specs on all the elements and I think you'll find the answers to the other three.

Answer 4

1)Flourine-its in the halogen group which is the group with the most chemically reactive non metals flourine's atomic number is 9
2)sry idk
3)Cesium
4)i cant answer this cause theres man made, discovered but not on the periodictable ect.
Hope this helps

Answer 5

What does most metallic mean????

And #4 is Ununoctium, element 118.

Answer 6

Within your restrictions tin is the densest. Ack! blast¬! no - Indium is denser.