Questions tagged [chemistry]

A puzzle that makes use of chemical knowledge, such as the names and atomic numbers of chemical elements.

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20 votes
2 answers
2k views

Longer Than Usual

This puzzle is part of the Monthly Topic Challenge #1: Restricted Title: xkcd 1xxx One for my fellow mapheads and pub quiz fans... There are many puzzles on PSE which use one-or-two-letter ...
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11 votes
2 answers
2k views

The return of the messy chemist

My Chemistry teacher is at it again. Today, I cautiously approached his office and stopped in the doorway instead of walking right in - and it's a good job I did. There he was again - bent over on the ...
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15 votes
2 answers
791 views

Alchemy in a Tin Kit

As usually happens when rummaging through one's grandparents' attic, I unwittingly discovered a seemingly ancient papyrus manuscript. It was stored in an old tin box along with some utensils. I ...
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11 votes
1 answer
678 views

__________ is the way to go!

I'm looking for a 10-letter word.
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17 votes
1 answer
515 views

PSE Advent Calendar 2021 (Day 22): Quick Math Card

This puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door > I found the ...
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-2 votes
2 answers
335 views

Number of elements as compound

What simple compound is precious to life and encodes the total number of elements? What other thing does it code and is revered by some as precious to life? Accepted solution should show how the ...
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6 votes
2 answers
510 views

What kind of sequence is this?

Start with 1 1 1 2 1 2 1 1 8 2 1 2 8 ? Your answer should explain what these numbers represent. Hint 1: Hint 2: Hint 3
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17 votes
1 answer
1k views

The messy chemist

This morning I walked into my Chemistry teacher's office to ask him a question and felt my foot collide with something. I looked down at the floor and saw a load of Periodic Table element flashcards ...
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5 votes
1 answer
453 views

Bananas for chemistry

Going bananas for chemistry... First I have standards, and my yearbook likely starts with why I'm part of AVEN. In the end, I name four art galleries that have a sweet founder. My parents were ...
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10 votes
2 answers
427 views

The Blue Periodic Puzzle

This puzzle follows from the Purple Periodic Puzzle and Green Periodic Puzzle (these puzzles are solved independently). Yet another periodic table has been uncovered and hides a secret word. Can you ...
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12 votes
1 answer
358 views

The Green Periodic Puzzle

This puzzle follows from the Purple Periodic Puzzle (these puzzles are solved individually). Another strange periodic table has appeared and it's hiding a secret word. Can you find out what's strange ...
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17 votes
1 answer
628 views

The Purple Periodic Puzzle

Below is a periodic table that's hiding a secret word. Can you find out what's strange about this purple periodic table and find the answer. Text-only version: ...
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15 votes
1 answer
400 views

Earth Science | Chemistry + Flags

An entry in Fortnightly Topic Challenge #48: Unusual tag mix Which famous chemist is represented by these flags? Go big or go home!
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15 votes
1 answer
329 views

Words with Alchemists

You are probably familiar with Word Ladders, where you attempt to transform one word into another by switching one letter at a time, with each transformation forming a new word. This puzzle is similar....
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10 votes
3 answers
223 views

An Elementary Connect Fano Plane

I never thought I'd be able to make a connect Fano plane out of chemical elements, since there are so few to choose from. And I was right, but I got really close. So if you haven't seen previous ...
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7 votes
3 answers
589 views

Scientifically Themed Rebus/Dingbat Puzzles - Part 4

The same basic idea (I have a lot of these): science-styled expressions that represent some popular media. Previously, some guesses were for things I would say aren't that well known, so keep in mind ...
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8 votes
2 answers
314 views

Practical Chemo Opus

Herb Clark likes few substances, such as: CARBON, NEON, SILICON, PHOSPHORUS, IRON, COPPER, ARSENIC, KRYPTON, ... Find others per inclination.
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8 votes
4 answers
1k views

Scientifically Themed Rebus/Dingbat Puzzles

Below I have created a list of a few "scientific" expressions that represent some form of popular media, with the type stated. Hope you enjoy.
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25 votes
1 answer
928 views

An Evolutionary Experiment

Dr. Farnsworth entered class today and announced that we were going to conduct an experiment to see if we could force cells to evolve to communicate with us. The experiment is as follows: we are given ...
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18 votes
1 answer
433 views

Dr Aphorism's advice

My old science teacher Dr Aphorism was brilliant – not just at teaching (and, of course, science), but also at providing invaluable life advice. I always remember one day when I went to her office to ...
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2 votes
1 answer
104 views

What's the graph relation? #4

What's the relation that joins the nodes? Previous What's the graph relation? #1 What's the graph relation? #2 What's the graph relation? #3
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7 votes
2 answers
259 views

A special chemical compound with a touch of math

What do you get when mixing Aluminium, Neon, Nitrogen, Sulfur, Titanium, Vanadium, and two math ingredients $\lim_{n\to\infty}(1+\dfrac{1}{n})^n $ and (degree,?,seconds) and don't ask ...
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8 votes
2 answers
527 views

Troubling Triples

The points appear to be connected, but in the end, we should have worked under aqueous conditions. Substance Temperature (K) Pressure (kPa) Acetylene 173.1 26.6 Ammonia 109.5 21.9 Argon 115.8 74.1 ...
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11 votes
2 answers
2k views

Chemistry Riddle

Here is a riddle for all you science nerds out there! Each clue will give you a word or chemical. Tell me how these link together. Clue 1: Work out the chemical and take its atomic symbol part 1: ...
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-6 votes
2 answers
273 views

Who doesn’t belong in the group? [closed]

Identify the ones that are oddballs B C Ba W H Fe Si Br Rn I N O P
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-6 votes
1 answer
92 views

Professor Clark’s Precious Chemical Connections

They are primarily eight precious ones. Fill in the X s with appropriate letters to reveal all the 8 Precious Metals. Each X represents a letter. 1,5,7..vertical. 2,3,4,6,8..horizontal
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11 votes
1 answer
1k views

Elementary, my dear …

My list for today Iodine-Sulfur+Americium-Scandium:Phosphorus Iodine-Titanium+Molybdenum+Thorium+Yttrium-Lithium:Helium Praseodymium+Oxygen+Vanadium+Erbium+Boron+Sulfur-Lithium:Aluminum ...
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15 votes
1 answer
2k views

Professor Roman loves to teach unorthodox Chemistry

His famous phrase in class was “ Elementary Watson”. Given: $IRON$ = $5$ - $4$ $M$ = $6$ - $9$ Find the Missing Element M.
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2 votes
1 answer
147 views

The Adventures of Jack #3

He's back at it again! 'Twas the night before Christmas, And Jack only wanted one thing. A hat - what else would he need? Jack thought about colours, possibly crimson. But the way he was - he'd ...
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7 votes
1 answer
338 views

A Christmas Gift

Thanksgiving done and Christmas around the corner. Both mom and dad were whispering in the hallways glancing over their shoulders to ensure no one was listening. I knew they were planning something ...
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6 votes
1 answer
544 views

Guess what letter conforming each word

This is an entry in the Fortnightly Topic Challenge #41: Short and Sweet. 1 letter only could be mean anything. With an additional letter in front, could be used as medicine component and something ...
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35 votes
2 answers
1k views

A Periodic Puzzle

Entry into Fortnightly Topic Challenge #38: Reusing Information 1 Isn't it nice to have the same information to depend on, that you know will be reused? ... Wait, who said that you were getting that ...
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1 vote
1 answer
188 views

Odd-one-out chemistry word play

Find the odd one out: Onions Thioacetone Naphthalene Cyclobutadiene Guanidine Cadaverine Carbon diselenide Benzene Edit: I forgot Benzene but I added it.
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9 votes
3 answers
578 views

Acids and Bases

I have 6 solutions. 3 of them are acids, and 3 of them are bases. The acids and the bases (HCl and NaOH respectively) both have solution with a concentration of $0.1M$, $1M$, and $10M$. I don't know ...
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6 votes
5 answers
567 views

Longest word made from a chemical molecule?

I was wearing my Bacon t-shirt, and got to wondering, what's the longest word made solely with the atomic symbols of every atom in a compound? For example, ${CO_{2}}$ would be coo, since there are ...
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  • 3,014
6 votes
1 answer
195 views

Means of Transportation

The answer to this puzzle is a vehicle or a type of transportation. It is created by using simply parts of air, a noble metal and a heavy metal. What is it?
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14 votes
4 answers
2k views

Lifting is my best known work

Virtuous, but I'm of no form My seat's right at the very top Where gangs of many is the norm My one peer is one that goes 'pop' Though my uses are many Lifting is my best known work ...
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-1 votes
1 answer
165 views

Dismissing Lewis [closed]

If I were to take a benzene molecule: And throw physics out the door, replacing the carbon atoms with iron, What would it be called now? Hint: Credits: SPOILER ALERT, ANSWER WITHIN
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0 votes
2 answers
203 views

First I'm the parent and then I'm the daughter

A simple, one sentence riddle which I'm confident you'll know when you have the correct answer. First I'm the parent, but I lose He and some energy, then become the daughter. What does this riddle ...
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7 votes
5 answers
2k views

Single letter chemical elements on a 2x2 grid

In the past somebody showed me the puzzle below. I remember the answer but not the entire solution. Here it goes: On a grid of 2x2 put four single letter chemical elements. The result should have ...
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4 votes
1 answer
178 views

A longer chemical word

YEs, LuSH CHOCoLaTe CrYPTaNAlYSiS! ...are all English words formed by chaining a string of distinct, standard chemical symbols. A $19$ character example is IrReCoNCILaBiLiTiEs. Can you find two ...
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21 votes
3 answers
19k views

What is my real name?

My Father is a Chemist My Mother is a Mathematician They call me iron59 What is my real name?
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1 vote
3 answers
501 views

Can you guess the name of Jim's girlfriend?

Ben and Jim are best friends and like playing pranks among themselves. Once Ben sent a fake phishing link to Jim to know his girlfriend's name but Jim was clever and instead of entering his girlfriend'...
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  • 5,285
6 votes
1 answer
1k views

The Odd Chemistry Teacher

My son's chemistry teacher is quite a nice person, but, I'd say, a little weird . Well, it has never been too much of problem -- never before yesterday, when I went up to him for some serious talk. ...
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3 votes
2 answers
362 views

What number is missing?

This is a sequence, that if transformed correctly, gives a sequence that is easily recognized by experts in a particular field of science. There is a number missing, though. Can you help? 57, 86, ...
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6 votes
6 answers
3k views

I Solemnly Swear That I Am Up To No Good

Quite simple. Find the odd one out, follow the instruction to give you a letter and then give me the code word. Two pieces of advice first: 1) They gradually get harder (in my opinion) 2) Don't ...
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  • 2,662
9 votes
1 answer
813 views

What is my name? Simple puzzle

I am a chemical element .---- ----- I am your ..-. .-. .. . -. -.. Combine them together now I am a country What is my name?
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5 votes
3 answers
1k views

Chemistry Rebuses

These rebuses aren’t original but I quite liked them when I first saw them so I’ll share them here. The first 2 are probably well known, but the last one is slightly more challenging. ...
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  • 2,940
14 votes
2 answers
473 views

A Fantasy Gathering

At the gathering of the fantasy creatures, a small group of elemental beasts gathered at the bar. "Oh, interesting!" said the cat, "if you remove two letters from your type, you have your name!" "...
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  • 1,425
26 votes
3 answers
2k views

Tell me who I am: To lead, she leads, daughter my

I am not married, but a daughter have I And to lead, she leads, daughter my I was part of the li'l boy that once rocked history I am just you, I ain't a mystery Who am I?
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