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Steve Cohen

@drstevecohen

Chemical history๐Ÿงช (podcast โ€œThe History of Chemistryโ€; book โ€œO Mg! How Chemistry Came to Beโ€)/Author/Jewish music/Yiddish (raised 2 Yiddish-speaking children)/Calligraphy/Genealogy/Etc. Attempts to argue that science isnโ€™t real get you blocked.

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Latest posts by Steve Cohen @drstevecohen

If I recall, the Curies coined the term โ€œradioactivityโ€, reading from their 1898 paper.

01.03.2026 14:45 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Pencil drawing of a seated teddy bear

Pencil drawing of a seated teddy bear

Photo of a seated brown teddy bear

Photo of a seated brown teddy bear

My daughter and I just began an art challenge. First theme: stuffed animals. Here is mine. #artchallenges #drawing #drawsomething #pencildrawing

27.02.2026 17:40 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
List of 13 rules to reduce intelligibility and communication at talks.

List of 13 rules to reduce intelligibility and communication at talks.

Iโ€™ve seen pretty much all of these at talks.

27.02.2026 02:51 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Walther Nernst published his groundbreaking "Thermodynamische Berechnung chemischer Affinitรคten" 112 years ago in Ber. Deutsch. Chem. Ges., 47 (1914), 608-635. #ChemSky ๐Ÿงช Original is here: ia600607.us.archive.org/view_archive... and English is here: web.lemoyne.edu/giunta/Nerns...

23.02.2026 19:56 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Didnโ€™t Dr Margaret Todd really invent the term?

19.02.2026 04:13 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I understand that the ACS Inclusivity Style Guide still does not include Gender & Sexuality nor Race, Ethnicity, and Sexuality, and this has been missing for a whole year. What could *possibly* take a year to fix? Seriously? How does the ACS really support scientists then?

19.02.2026 04:11 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Berichte der Deutschen chemischen Gesellschaft zu Berlin Berichte der Deutschen chemischen Gesellschaft zu Berlin -- 1886-01-01 -- fascicules

140 years ago this month, Clemens Winkler announced the discovery of germanium in Ber Deutschen Chem Gesell, 19(1): 210โ€“211. Fun fact: I used Ge wafers in my PhD research (apps.dtic.mil/sti/tr/pdf/A...). #ChemSky ๐Ÿงช Read Winkler's paper here at gallica.bnf.fr/ark%3A/12148...

18.02.2026 16:03 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Would be fair to say โ€œMazel tov!โ€?

08.02.2026 20:21 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Structures of Ethylene Oxide and Cyclopropane. Discover this 1947 paper in Nature by WALSH, A. D. Abstract: THE formula of ethylene oxide is commonly portrayed as (I), the instability of the compound being ascribed to the existence of strain tendi...

79 years ago this month, British chemist Arthur Walsh published in "Nature," 1947, Vol 159 (4031), p 165, describing cyclopropane and ethylene oxide less as triangular rings, and more as complexes using the ฯ€-bond of the C=C. #Chemsky ๐Ÿงช See the abstract here: openurl.ebsco.com/EPDB%3Agcd%3...

03.02.2026 20:31 ๐Ÿ‘ 4 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

As a grad-student TA at Rice University in Houston, I would send freshmen home to change into closed-toe shoes and long trousers before letting them do lab work.

29.01.2026 03:51 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Actually itโ€™s way past time. Iโ€™ve been waiting for famous folks to start promoting this for months.

26.01.2026 15:39 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

The alternative is certainly not a good thing.

18.01.2026 21:55 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

OMG

16.01.2026 18:51 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

This month 103 years ago, Thomas Lowry published "The uniqueness of hydrogen". J Soc Chem Ind, 1923, vol 42 (3): 43โ€“47. He proposed (independently of Brรธnsted) that acids donate protons, and bases accept protons. (I'd like to find the original article to link to, but cannot.) #ChemSky ๐Ÿงช

16.01.2026 16:21 ๐Ÿ‘ 5 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I am curious as to why no one is calling out Ford for inviting a rapist felon.

15.01.2026 18:03 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Sorry: radon, not radium

09.01.2026 23:14 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
ChemTeam: Rutherford's Discovery of Half-Life

126 years ago this month, Rutherford published his "A Radio-active Substance emitted from Thorium Compounds," Phil. Mag., Jan. 1900, ser. 5, xlix, pp. 1-14. He detected what was later known to be radium, and noted its half-life. Read the paper here: #ChemSky๐Ÿงช www.chemteam.info/Chem-History...

08.01.2026 22:58 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Three-phase 240 V electrical current

05.01.2026 20:02 ๐Ÿ‘ 3 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

240 V three-phase power, when I was a stupid grad student

05.01.2026 19:27 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Bwahaha

02.01.2026 20:43 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Oh, how about mild-mannered van der Waals energy?

02.01.2026 15:58 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

As in the man who wears masksโ€ฆ

31.12.2025 19:11 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Can you tell me where the quote is from?

31.12.2025 19:10 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Louis-Joseph Gay-Lussac

On the last day of 1808, Gay-Lussac's "Memoir on the Combination of Gaseous Substances with Each Other," Mรฉm. de la Soc. d'Arcueil 2, 207 appeared. It advanced Dalton's idea of atoms, and rejected Berthollet's variable proportions. #ChemSky ๐Ÿงช Read it here: web.lemoyne.edu/giunta/gaylu...

31.12.2025 16:42 ๐Ÿ‘ 6 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Youโ€™ve just opened a Chemistry themed pub. What are you calling it?

The Flask and Column

#ChemSky #ChemChat

27.12.2025 17:31 ๐Ÿ‘ 42 ๐Ÿ” 7 ๐Ÿ’ฌ 50 ๐Ÿ“Œ 16

Alkynes of Spirits

27.12.2025 22:17 ๐Ÿ‘ 9 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I became known in my shul as โ€œthe guy who speaks Yiddish to his kids.โ€

27.12.2025 22:10 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I will add that neither kid was thrilled with my insistence on Yiddish, but my daughter realized in high school that it was cool to be bilingual, when a friend commented on it.

27.12.2025 22:09 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

ืื™ืš ื”ืึธื‘ ื’ืขื”ืึธื“ืขื•ื•ืขื˜ ืžืฒึทื ืข ืงื™ื ื“ืขืจ (ืื™ืฆื˜ 23 ืื•ืŸ 29) ืื•ื™ืฃ ื™ื™ึดื“ื™ืฉ, ืžื™ื˜ ื–ื™ื™ืขืจ ืžืึทืžืขืŸ ื•ื•ืึธืก ืจืขื“ื˜ ื™ื™ึดื“ื™ืฉ ื ื™ื˜โ€”ืื•ืŸ ืื™ืš ื‘ื™ืŸ ืึทืคึฟื™ืœื• ื ื™ื˜ ืงื™ื™ืŸ ื’ืขื‘ื•ื™ืจืขื ืขืจ. ืกืณืื™ื– ื™ืึธ ืžืขื’ืœืขืš.

27.12.2025 22:08 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

โ€œ...unโ€ฆโ€, not โ€aunโ€. โ€œUnโ€ means โ€œandโ€ in Yiddish

27.12.2025 16:17 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0