chemical element

(Askeri) KİMYA; BİYOLOJİ VE RADYOLOJİ KISMI: Karargah Kimya Şubesinin; harekat merkezinde faaliyette bulunan ve başlıca görevi kimya ve biyoloji faaliyetlerini diğer destek faaliyetleriyle koordine etmek, dost ve düşman kuvvetlerce nükleer silahların kullanılmasından meydana gelen serpintiyi hesaplamak ve kimyasal, biyolojik, radyolojik değerlendiren kısım

gadolinium

(Nükleer Bilimler) (gd) gadolinyum

gadolinium

(Tıp) Gd sembolü ile bilinen, atom.no: 64 ve atom ağırlığı: 157.26 olan kimyasal element, gadolinyum

الإنجليزية - الإنجليزية

تعريف chemical element في الإنجليزية الإنجليزية القاموس.: Any one of the simplest chemical substances that cannot be decomposed in a chemical reaction. Chemical elements consist of atoms which have the same number of protons; any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter; fundamental building blocks of chemical compounds; One of the 114 presently known kinds of substances that constitute all matter at and above the level of atoms (the smallest units of any element). All atoms of an element are identical in nuclear charge (number of protons) and number of electrons (see atomic number), but their mass (atomic weight) may differ if they have different numbers of neutrons (see isotope). Each element has a one-or two-letter chemical symbol. Elements combine to form a wide variety of compounds. All elements with atomic numbers greater than 83 (bismuth), and some isotopes of lighter elements, are unstable and radioactive (see radioactivity). The transuranium elements, with atomic numbers greater than 92 (see uranium), artificially created by bombardment of other elements with neutrons or other particles, were discovered beginning in 1940. The most common elements (by weight) in Earth's crust are oxygen, 49%; silicon, 26%; aluminum, 8%; and iron, 5%. Of the known elements, 11 (hydrogen, nitrogen, oxygen, fluorine, chlorine, and the six noble gases) are gases under ordinary conditions, two (bromine and mercury) are liquids (two more, cesium and gallium, melt at about or just above room temperature), and the rest are solids. See also periodic table; {i} gallium; {i} terbium; {i} bromine; {i} gadolinium; {i} boron; {i} Ne
chemical elements: plural form of chemical element