Top 10 Most Dangerous Elements on the Periodic Table

The Top Ten
1 Plutonium Plutonium is a radioactive actinide metallic element with the atomic number of 94. It has a symbol of Pu. It belongs to actinide family.

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

This element is very dangerous since it used in nuclear bombs.

It belongs on top of this list.

It is used in nuclear bombs

2 Caesium

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

Sub to pewdiepie

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! )

4 Uranium

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

Its Radioactive and Toxic!

5 Mercury

Liquid metal found in thermometers which are very dangerous in our brain.

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

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

Arsenic is a form of white poison and is incredibly lethal. Stay away from that stuff

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

Almost deadly

10 Oganesson

Just is dangerous. Don't mess with it

The Contenders
11 Francium

Water + Francium=A Big Boom

12 Thallium

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

13 Californium

This is so dangerous it really deserves the top of this list

14 Lead

Lead was used in makeup during the 1800's or so. Queen Elizabeth herself used makeup containing lead that had completely eaten her flesh away, she was left with very pale skin and was almost blad by the age of 30. Most people say she died due to lead poisoning from her makeup.

Commonly found in batteries so batteries are very dangerous to swallow.

Toxic that was once abundant in uses

15 Chlorine
16 Radium

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

17 Astatine

Yep it sure is

18 Cadmium
19 Potassium

It explodes and can cause fire in water. How do you extinguish the flames if it catches fire? NOT WATER!

20 Radon

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 Protactinium

Super deadly. One bare touch and your dead.

22 Hydrogen
23 Chromium
24 Thorium
25 Beryllium
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