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2 days ago · Nonmetals are chemical elements that mostly lack distinctive metallic properties. They range from colorless gases like hydrogen to shiny crystals like iodine. Physically, they are usually lighter (less dense) than metals; brittle or crumbly if solid; and often poor conductors of heat and electricity.
1 day ago · modifier. L' aluminium est l' élément chimique de numéro atomique 13, de symbole Al. Il appartient au groupe 13 du tableau périodique ainsi qu'à la famille des métaux pauvres . Le corps simple aluminium est un métal malléable, argenté, peu altérable à l'air note 1 et peu dense.
- Aluminium
- Al
- 13
- 13
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1 day ago · Chromium, a metal and sulfur, a non-metal. The periodic table can be broadly segregated into two types of elements, commonly referred to as metals and non-metals. Each of these elements have varying properties and can be found in a wide variety of places, such as bridges, buildings, roads, electric cables, cars, aircraft, mobile phones, and ...
2 days ago · Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Gemstones high in beryllium include beryl ( aquamarine, emerald, red beryl) and chrysoberyl.
- white-gray metallic
- group 2 (alkaline earth metals)
- 4
3 days ago · Properties [ edit] Yttrium is a soft, silver-metallic, lustrous and highly crystalline transition metal in group 3. As expected by periodic trends, it is less electronegative than its predecessor in the group, scandium, and less electronegative than the next member of period 5, zirconium.
- silvery white
- group 3
- 39
1 day ago · Gold is a chemical element; it has the symbol Au (from the Latin word " aurum ") and the atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals.
3 days ago · Bismuth is a chemical element; it has symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs naturally, and its sulfide and oxide forms are important commercial ores.
