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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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10 votes
1 answer
719 views

Chemistry Nobel

This puzzle is part of the Monthly Topic Challenge #16: Restricted Title: xkcd 2000-2500. When this year's Nobel Prize in Chemistry was awarded, an exclusive group of 12 still-living previous ...
Stiv's user avatar
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10 votes
1 answer
1k views

Chemistry Puzzle

Here's a little chemistry themed puzzle I made for a website a year or two back. You don't need to be a chemist or anything - I only took the basics in college Hint 1 (Probably good to know)
PropertyBrother's user avatar
13 votes
1 answer
708 views

An engineer, a mechanic and an athlete walk into a bar

...to exchange puzzles about the thing they talked about the other day and have a drink. The engineer showed these numbers: 2, 8, 14, 2, 99 2, 4, 0, 0, 1 The ...
web adventurer's user avatar
6 votes
2 answers
2k views

Element lost? Call a scientist!

I was searching for a specific element, but I couldn't find it. So I called three scientists in different countries in order to find the element. What was the element I was looking for, and where am ...
Lezzup's user avatar
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16 votes
1 answer
2k views

This won't work with US states

This puzzle is part of the Monthly Topic Challenge #12: mobile-friendly puzzles. For each of the following sequences, identify the three missing terms (marked by '???'): Nitrogen, Fluorine, Argon, ...
Stiv's user avatar
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12 votes
1 answer
2k views

Chem-is-try is hard

You are a chemist and ask your coworker to puzzle you. They give you this puzzle and ask you to solve it. LiPSiNArHCaScMgHCaFPSiK
Varun W.'s user avatar
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25 votes
1 answer
1k views

Valence Levels?

Each yellow and orange (barred to distinguish) dot gets a letter. The center green dot does not get a letter. The final answer is a relevant word, once you unscramble it.
Amoz's user avatar
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4 votes
1 answer
460 views

Five element puzzle

Born from water sun stone be B. Five elements are ki. The first give three, the rest he. In five symbols, eight see. From them form, evidently That which is written for thee.
David's user avatar
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21 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 ...
Stiv's user avatar
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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 ...
Stiv's user avatar
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15 votes
2 answers
830 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 ...
caPNCApn's user avatar
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11 votes
1 answer
731 views

__________ is the way to go!

I'm looking for a 10-letter word.
Prim3numbah's user avatar
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17 votes
1 answer
625 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 ...
caPNCApn's user avatar
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-3 votes
2 answers
363 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 ...
David's user avatar
  • 862
6 votes
2 answers
525 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
DrD's user avatar
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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 ...
Stiv's user avatar
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5 votes
1 answer
470 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 ...
PuzzlingFerret's user avatar
9 votes
2 answers
495 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 ...
DenverCoder1's user avatar
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12 votes
1 answer
396 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 ...
DenverCoder1's user avatar
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17 votes
1 answer
761 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: ...
DenverCoder1's user avatar
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15 votes
1 answer
417 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!
samm82's user avatar
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8 votes
1 answer
458 views

What's my number riddle

The first and the last of the days of the week, I and Ζ they are numbers in Latin and Greek. In N and in Z, and period and group, Of them I consist and I always have been But now in my name, what ...
David's user avatar
  • 862
15 votes
1 answer
335 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....
Jeremy Dover's user avatar
10 votes
3 answers
247 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 ...
Jeremy Dover's user avatar
7 votes
3 answers
717 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 ...
user110503's user avatar
8 votes
2 answers
315 views

Practical Chemo Opus

Herb Clark likes few substances, such as: CARBON, NEON, SILICON, PHOSPHORUS, IRON, COPPER, ARSENIC, KRYPTON, ... Find others per inclination.
Jeremy Dover's user avatar
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.
user110503's user avatar
25 votes
1 answer
968 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 ...
Jeremy Dover's user avatar
18 votes
1 answer
454 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 ...
Stiv's user avatar
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2 votes
1 answer
105 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
Galen's user avatar
  • 2,296
7 votes
2 answers
267 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 ...
ThomasL's user avatar
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8 votes
2 answers
530 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 ...
HTM's user avatar
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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: ...
William Pennanti's user avatar
-6 votes
2 answers
282 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
Uvc's user avatar
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-6 votes
1 answer
103 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
Uvc's user avatar
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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 ...
Rubio's user avatar
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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.
Uvc's user avatar
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2 votes
1 answer
148 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 ...
TakingNotes's user avatar
  • 3,449
7 votes
1 answer
371 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 ...
SolveLikeBeaker's user avatar
6 votes
1 answer
551 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 ...
Mukyuu's user avatar
  • 711
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 ...
boboquack's user avatar
  • 22k
1 vote
1 answer
200 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.
tox123's user avatar
  • 782
9 votes
3 answers
587 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 ...
Peregrine Lennert's user avatar
6 votes
5 answers
599 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 ...
Herb's user avatar
  • 3,333
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?
DrD's user avatar
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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 ...
busukxuan's user avatar
  • 1,115
-1 votes
1 answer
169 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
Tommy Woldt's user avatar
0 votes
2 answers
205 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 ...
Tommy Woldt's user avatar
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 ...
Peter Janssen's user avatar
4 votes
1 answer
186 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 ...
Jonathan Allan's user avatar