Every element on the periodic table is unique

[RuiAce]

I got bored of the numbers, so let’s try something new. Let’s see if we can reach 118.

Edit: Non chemistry facts are welcome, but let’s try to keep them more specific than vague.

Hydrogen - The first reagent fused in stars.

[K.Smithy]

(I don't study chemistry, but I did learn like half of the periodic table song so here we go...)
Helium - the thing that makes your voice sound high pitched

EDIT: I referred to Dr Google, and according to Wonderopolis.org (sounds legit... Ik) the reason it changes how your voice sounds is due to its density. Helium is much less dense than air (hence why a balloon will rise if you fill it with helium). Due to this, sound is able to travel through helium more than twice as fast as it can through good old air. Although some may think that helium changes the pitch of your voice, in reality it doesn't. You vocal cords continue to vibrate at the same frequency - helium merely allows sound to travel faster, thus affecting the timbre of your voice. Thanks for listening to my TED Talk

[Coolmate]

Lithium - Is a lightweight and soft metal, that has many uses.

[ArtyDreams]

Beryllium is a silvery-white metal and is sometimes used in the making of cell phones.

[RuiAce]

Lithium - Is a lightweight and soft metal, that has many uses.

Ok I’ll edit the opening post, but let’s try to make the facts more specific or interesting. For example, Lithium - lightEST metal or something about, say the lithium ion in batteries.

Boron - Only metalloid in period 2. For something so light, it’s synthesised more often by man than being naturally occurring on Earth

[sweetiepi]

Carbon: nanotubes of carbon are used in experimental medicines

[K.Smithy]

nitrogen (🎶"all through the air"🎶) - Titan, Saturn's largest moon, has an atmosphere that consists of over 98% nitrogen

[RuiAce]

Oxygen - It's known for having a more regular allotrope O2 used in respiration and combustion, and the more weirder allotrope called ozone O3.

[sweetiepi]

Fluorine: Hydrofluoric acid, HF, dissolves glass. Its fluoride ions have a high affinity for calcium and can cause death by interfering with the body’s blood calcium metabolism when absorbed through the skin.

Also about fluorine: most electronegative atom

[RuiAce]

Neon: The range of temperatures neon appears in a liquid state is smaller than that of every other element. The range is only over an approximately 2.5 K (and hence also 2.5 degrees Celsius) span.

[sweetiepi]

Sodium: comprises about 2.6% of the Earth's crust

[caffinatedloz]

Magnesium: created in stars, when helium and neon fuse under extreme pressure from temperature. It's the eighth most abundant element in the entire universe and is found all over the earth; both in the crust and the mantle, as well as dissolved in seawater.

[RuiAce]

Aluminium: Perhaps the most commonly used metal for foils. Lightest metal used (as the primary ingredient) in foils. Third most abundant element on Earth.

First post-transition metal of the periodic table.

[sweetiepi]

Silicon (element 14): Very rarely found naturally in its purest form!
Refined silicon is also used in electronics and semiconductors!

[RuiAce]

Phosphorus: Second most abundant mineral in the human body. Mostly because the phosphate ion shows up everywhere, for example in DNA. Commonly found in bones and teeth.

Pure phosphorus is known for showing up in various colours, as a consequence of its allotropes. Common ones include red, violet, and white phosphorus. It's the lightest elements to show up in such colours commonly. (It's not the lightest element with these allotropes though: at the very least carbon can manifest in diamond or graphite. But their colours are more boring...)