Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

  7. current community

    your communities

    more stack exchange communities

    company blog
Chemistry
Meta user
Network profile
18,648
reputation
32
58

porphyrin

I'm a semi-retired physical chemist.

556
answers
0
questions
~1.1m
people reached
  • Member for 3 years
  • 1,910 profile views
  • Last seen 12 hours ago

Communities (6)

Top network posts

We respect a laser-like focus on one topic.

Top tags (166)

Score 429
Posts 150
Posts % 27
Score 198
Posts 74
Score 196
Posts 52
Score 172
Posts 56
Score 164
Posts 59
Score 132
Posts 39
View all tags →

Top posts (556) All Questions Answers | Votes Newest

21 Understanding group theory easily and quickly Sep 7 '16
16 Is it possible for a substance to absorb a longer wavelength of EM wave and emit a shorter wavelength? Jul 7 '17
15 Why does bond angle decrease in the order H2O, H2S, H2Se? Aug 25 '16
13 Is there any empirical upper limit for order of reaction? Jul 19 '17
12 What is resonance, and are resonance structures real? Jul 31 '16
12 Why do spin isomers of hydrogen (ortho and para hydrogen) change their nuclear spin with temperature variance? Jan 29 '17
12 Can magnetic fields affect a chemical reaction? Jul 23 '16
11 Uv vis and fluorescence spectroscopy: sensitivity Nov 21 '17
11 Does deuterated water slow down the overall metabolism of a cell? Jul 23 '17
11 Why is the magnesium(II) ion preferred over other ions in chlorophyll? Feb 3 '17
View all questions and answers →

Badges (90)

Gold

—

Silver

32

Rarest

Bronze

58

Rarest

View all badges →