Top 10 Most Dangerous Elements on the Periodic Table


The Top Ten

1 Caesium

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.

2 Plutonium Plutonium

Used to make nuclear bombs. Ingestion of small amount can be lethal.

3 Uranium


its goes boom

4 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

5 Mercury
6 Technetium
7 Fluorine

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

8 Tennessine
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

? Titanium
? Potassium

The Contenders

11 Francium
12 Thallium

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

13 Chlorine
14 Lead

Toxic that was once abundant in uses - JuliaRandomly

Very rare Theese days


15 Radium
16 Astatine
17 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.

18 Californium
19 Beryllium
20 Hydrogen

Can kill you

21 Chromium
22 Protactinium

Super deadly. One bare touch and your dead.

23 Berkelium
24 Einsteinium
25 Thorium
26 Cadmium
27 Carbon
28 Osmium
29 Actinium
30 Lithium

Lithium is expletive if put in light to long

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