Top 10 Most Dangerous Elements on the Periodic Table


The Top Ten

1 Plutonium Plutonium



Oh my it's a piutonium cookie yummy!

It belongs on top of this list.

V 2 Comments
2 Caesium

So fun *drop*

It looks like gold but don't be fooled for it is explosive in water and cannot be used as a jewelry! - JuliaRandomly

Pyrophoric and vigorously reacts w/ water.

3 Polonium

It's found in tobacco! Another reason to stop smoking! (It's highly radioactive, with it's most stable isotope being about 139 days. For comparison, uranium's most stable isotope being around 4.5 billion years! )

Not really. Polonium 210 is far from the most stable. The actual most stable isotope has a half-life of 2000 years. - bstrz04

4 Uranium

Its Radioactive and Toxic!

What r u talking about? I literally am around this stuff.

its goes boom


5 Mercury
6 Technetium
7 Fluorine

Reactive, electronegative and an oxidizer, Fluorine must deserves the first place!

8 Tennessine

A radioactive halogen... much deadlier than the lanthanides and actinoids!

9 Arsenic

Preety dangerous, toxic and has many allotropes although my favorite among the metalloids. - JuliaRandomly

If you try to combine even a few micro grams of this element it will explode, since you can only combine so little, scientist can't even be positive on what it looks like
That is why this is the most dangerous element

10 Oganesson

Just is dangerous. Don't mess with it

The Newcomers

? Helium

Kill you if swallowed, atomic number two

Deadly if swallowed

Deadly if eaten

The Contenders

11 Francium
12 Thallium

Sure kills lots of people. Dangerous is it's word.

13 Californium


14 Astatine

Yep it sure is


15 Chlorine
16 Radium

This element is rather notorious for being the one that killed Mary Curie. - Rocko

17 Lead

Very rare Theese days


Toxic that was once abundant in uses - JuliaRandomly

18 Protactinium

Super deadly. One bare touch and your dead.

19 Potassium
20 Radon

I think it's RAD

This is a radioactive noble gas, thus unable to create any compunds or be in a stable state.
Also this is the 2nd most common cause of lung cancer after smoking.
Might not be as dangerous as plutonium but definitely one of the most dangerous elements.

21 Cadmium
22 Hydrogen

Can kill you

23 Chromium
24 Beryllium
25 Carbon

Well you need carbon to live, so...

26 Osmium
27 Berkelium
28 Einsteinium
29 Hafnium

Because eating hafnium is bad for you.

30 Curium

Trust me, you don't want to get anywhere near this one. - Rocko

31 Thorium
32 Actinium
33 Lithium

Lithium is expletive if put in light to long

34 Titanium
35 Hassium

Decays super fast and super radioactive. it dangerous

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