M.A.R.
  • Member for 7 years, 4 months
  • Last seen more than a week ago
  • Tabriz, Iran
3 answers
240 votes
34k views
89 bookmarks
Why is gold golden?
1 answers
221 votes
65k views
60 bookmarks
Why can we smell copper?
8 answers
176 votes
158k views
79 bookmarks
Can an atom have more than 8 valence electrons? If not, why is 8 the limit?
7 answers
113 votes
69k views
25 bookmarks
Is a negative pH level physically possible?
5 answers
104 votes
81k views
19 bookmarks
How do you melt metals with super high melting points?
2 answers
89 votes
35k views
46 bookmarks
What is Bent's rule?
7 answers
88 votes
128k views
48 bookmarks
Why is the 2s orbital lower in energy than the 2p orbital when the electrons in 2s are usually farther from the nucleus?
4 answers
78 votes
38k views
14 bookmarks
Bonding in diatomic C2, a carbon-carbon quadruple bond?
4 answers
66 votes
31k views
23 bookmarks
Why do elements in columns 6 and 11 assume 'abnormal' electron configurations?
4 answers
66 votes
21k views
14 bookmarks
How does Walter White make pure crystal meth using a non-stereospecific reaction?
4 answers
62 votes
54k views
20 bookmarks
How can one explain niobium’s weird electronic configuration?
4 answers
58 votes
226k views
16 bookmarks
Why add water first then acid?
3 answers
56 votes
11k views
7 bookmarks
Why do we write NH3?
6 answers
55 votes
11k views
14 bookmarks
The last element's atomic number
2 answers
52 votes
55k views
12 bookmarks
What makes some metals melt at higher temperature?
1 answers
50 votes
10k views
8 bookmarks
Why does menthol (e.g. peppermint) feel cool to the tongue?
5 answers
48 votes
8k views
15 bookmarks
How can antibonding orbitals be more antibonding than bonding orbitals are bonding?
5 answers
48 votes
80k views
21 bookmarks
Why does bond angle decrease in the order H2O, H2S, H2Se?
4 answers
47 votes
52k views
7 bookmarks
Why do the names of most chemical elements end with -um or -ium?
5 answers
46 votes
48k views
8 bookmarks
Is there any substance that's a 4-4-4 on the NFPA diamond?
3 answers
44 votes
8k views
6 bookmarks
Carbon atoms at the edge of a diamond
4 answers
43 votes
8k views
10 bookmarks
What is more acidic: D3O+ in D2O or H3O+ in H2O and why?
4 answers
42 votes
48k views
29 bookmarks
The reason behind the steep rise in pH in the acid base titration curve
1 answers
42 votes
5k views
5 bookmarks
Why is methane's molecular formula conventionally "CH₄", while water is "H₂O" (among others)?
1 answers
42 votes
88k views
6 bookmarks
Differences between phenols and alcohols
3 answers
41 votes
14k views
6 bookmarks
Why do impurities lower the melting point of an isolated substance?
3 answers
41 votes
5k views
7 bookmarks
Do molecules with bridges through rings exist?
2 answers
41 votes
22k views
12 bookmarks
How can the dipole moment of carbon monoxide be rationalised by molecular orbital theory?
2 answers
40 votes
58k views
14 bookmarks
Why do SN1 and SN2 reactions not occur at sp2 centres?
3 answers
40 votes
108k views
11 bookmarks
What is the inert pair effect?
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