Revisi per 11 Februari 2016 07.04 sunting Agung.karjono (bicara \| kontrib) Peninjau, Pengembali revisi 12.047 suntingan →‎Tabel unsur ← Revisi sebelumnya		Revisi per 11 Februari 2016 07.43 sunting balikkan Agung.karjono (bicara \| kontrib) Peninjau, Pengembali revisi 12.047 suntingan →‎Neon Revisi selanjutnya →
Baris 232: Neon adalah komponen renik dalam atmosfer tanpa peran biologis apapun. <!--▼ == Peran biologis == ~~Lithium~~[[Litium]] ~~has~~tidak nomemiliki ~~known~~peran ~~biological role~~biologis. ItUnsur isini ~~toxic~~bersifat racun, ~~except~~kecuali indalam ~~very~~dosis ~~small~~yang ~~doses~~sangat kecil.<ref>{{cite web\|url=http://www.rsc.org/periodic-table/element/3/lithium\|title=Lithium\|website=Periodic Table\|publisher=Royal Society of Chemistry\|accessdate=2016-02-11}}</ref> [[Berilium]] dan senyawanya beracun dan [[karsinogenik]]. Menghirup debu atau asap berilium, dapat menyebabkan inflamasi [[paru-paru]] yang tidak dapat disembuhkan, disebut [[beriliosis]].<ref>{{cite web\|url=http://www.rsc.org/periodic-table/element/4/beryllium\|title=Beryllium\|website=Periodic Table\|publisher=Royal Society of Chemistry\|accessdate=2016-02-11}}</ref> Beryllium and its compounds are toxic and carcinogenic. If beryllium dust or fumes are inhaled, it can lead to an incurable inflammation of the lungs called berylliosis. http://www.rsc.org/periodic-table/element/4/beryllium Boron is essential for the cell walls of plants. It is not considered poisonous to animals, but in higher doses it can upset the body’s metabolism. We take in about 2 milligrams of boron each day from our food, and about 60 grams in a lifetime. Some boron compounds are being studied as a possible treatment for brain tumours. http://www.rsc.org/periodic-table/element/5/boron [[Boron]] penting untuk dinding sel tanaman. Unsur ini tidak dianggap beracun untuk hewan, tetapi dalam dosis yang lebih tinggi dapat mengganggu [[metabolisme]] tubuh. Asupan orang normal sekitar 2 miligram boron per hari dari makanan, dan sekitar 60 gram seumur hidup. Beberapa senyawa boron sedang diteliti sebagai kemungkinan penyembuhan [[tumor]] [[otak]].<ref>{{cite web\|url=http://www.rsc.org/periodic-table/element/5/boron\|title=Boron\|website=Periodic Table\|publisher=Royal Society of Chemistry\|accessdate=2016-02-11}}</ref> ▲<!-- Carbon is essential to life. This is because it is able to form a huge variety of chains of different lengths. It was once thought that the carbon-based molecules of life could only be obtained from living things. They were thought to contain a ‘spark of life’. However, in 1828, urea was synthesised from inorganic reagents and the branches of organic and inorganic chemistry were united. Living things get almost all their carbon from carbon dioxide, either from the atmosphere or dissolved in water. Photosynthesis by green plants and photosynthetic plankton uses energy from the sun to split water into oxygen and hydrogen. The oxygen is released to the atmosphere, fresh water and seas, and the hydrogen joins with carbon dioxide to produce carbohydrates. Some of the carbohydrates are used, along with nitrogen, phosphorus and other elements, to form the other monomer molecules of life. These include bases and sugars for RNA and DNA, and amino acids for proteins. Living things that do not photosynthesise have to rely on consuming other living things for their source of carbon molecules. Their digestive systems break carbohydrates into monomers that they can use to build their own cellular structures. Respiration provides the energy needed for these reactions. In respiration oxygen rejoins carbohydrates, to form carbon dioxide and water again. The energy released in this reaction is made available for the cells. http://www.rsc.org/periodic-table/element/6/carbon Baris 251 ⟶ 250: --> == Tabel unsur == {{Tabel periodik (periode 2)}}

Unsur periode 2: Perbedaan antara revisi