hydrogen you can make it with existing elements and its one of the most basic elements out there.

ok neutons are there but make elctrons that can male sum mall spark or protons
and also make a colem that some things can move eg

eg we can make a canon but no ball to fire see my point

Major Edit, go here for my suggestion for Platinum, Liquid Platinum and Palladium

https://powdertoy.co.uk/Forum.html?action=vthread&forum=2&topic=2274

I have an idea ... I know there is concrete but .. And if we could mix with water and sand and make a concrete wall for a home you know ...?

PTNC - Positive To Negative Conductor

An electronic that:
Only conducts from 'PSCN and PTCT'
And only conducts to 'NSCN and PTCT'

Wow so much suggestion now . Ok first - I'm happy that plastic is in PT! I waited for implementing my idea long time . Second I suggested before couple of elements and I suggested Quartz

Quartz - QRTZ - Produce spark when pressurized and only to NSCN when sparked by PSCN it startes to twitch(Just moves randomly but don't go too far away).

I just wanted to remind this Idea and change it slighty to be better in my thought.

Portal that can move photons

Wilq15
Where is plastic and havent seen you in a while!

Eeee. Can I haz Zirconium?

ZIRC
Almost identical to METL, but transparent for neutrons and melts at 2125 K.

Thanx again.

den_koshkin
>.< we need significant value for ideas.