![]() The 1 st period has only two elements: hydrogen in group 1 and helium in group 18, with a gap from group 2 to group 17. The periods are numbered: 1 at the top to 7 at the bottom. Post memes/jokes in /r/chemistrymemes and /r/chemistryjokes. The periodic table has seven horizontal rows called periods. Any such posts will be deleted.Īsk education and jobs questions in the current weekly topic. If you're looking for a more concentrated, advanced discussion of chemistry topics among professionals and grad students, check out /r/Chempros.īefore asking "What chemical is this?" see this chart. Click here for the OSHA chemical data site and here for a multicompany MSDS aggregate search. Explanation: The metals in group I are most reactive, reactivity rising as you go down the column. All of the elements in a group share the same number of valence. Chemistry The Periodic Table Metals and Nonmetals. Refresher: The periodic table is organized into groups - where each column comprises a group. They decrease in reactivity down the group but increase in their melting and boiling points. If you spill/injure yourself contact medical professionals and read the MSDS, do not post to this reddit. The Halogens in Group 17 are non metal elements that are diatomic and simple covalently bonded. Yes links to blogs, images, videos, comics, and infographics are okay especially if they are on your personal website. No physorg, sciencedaily, or other press release aggregator spam! View solution > Which group in the periodic table contains only nonmetals Medium. All the elements in a group in the Periodic Table have the same. If a caption or explanation is included this helps, but please use your discretion.īefore asking about chemical drawing/illustration programs, look at your school's IT/software website and see if they provide an institutional license of ChemDraw (hint: if they have a chemistry department, they will) What is the most reactive group on the periodic table Medium. Likewise, simple pictures of uninteresting and garden variety chemistry-related things are not appreciated. No memes, rage comics, image macros, reaction gifs, or other "zero-content" material. ![]() However, academic discussions on pharmaceutical chemistry and the science of explosives are permitted. Revise the history, patterns and structure of the periodic table including groups and periods group 1 metals transition metals non-metals reactivity. They also become more reactive in water, as their reactivity increases. They may be usually located in salts, where you can physique-focused cubic composition. ![]() These metals are most reactive when in contact withwater and air, or oil. Rules: Violating a rule will result in a ban.Īsk homework, exam, lab, and other undergraduate-level questions at ChemicalForums otherwise it will be deleted.ĭiscussions on illicit drug synthesis, bomb making, and other illegal activities are not allowed and will lead to a ban. The name alkali metals arises from the Arabic term al-qali, meaning ashes.
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