acs.org 的前十大競爭對手

rsc.org

Find out more about our information, advice and guidance to help you make decisions on learning, training and work.

pubchem.ncbi.nlm.nih.gov

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.

iupac.org

IUPAC serves the international scientific endeavor in the dual function of a basic science and a mission-oriented Union. The Union is in a unique position

chem.libretexts.org

The LibreTexts libraries collectively are a multi-institutional collaborative venture to develop the next generation of open-access texts to improve postsecondary education.

ptable.com

Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

sciencenotes.org

Try the floating dry erase marker experiment. Draw hearts, fish, etc. using a dry erase marker and see the image float in water.

aps.org

The American Physical Society is a nonprofit membership organization working to advance physics by fostering a vibrant, inclusive, and global community dedicated to science and society.

aip.org

In early 2026 the Department of Labor is expected to post a notice of proposed rulemaking to revise upward the pay employers must offer to foreign workers who would have an H-1B visa or an employment-based green card. A prior rulemaking attempt offers clues as to how pay might be affected for…

iop.org

Views, news and comment from Institute staff, physicists and policy makers.

sigmaaldrich.com

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