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Diatomic molecules (from Greek di- 'two') are molecules composed of only two atoms, of the same or different chemical elements. If a diatomic molecule consists of two atoms of the same element, such as hydrogen ( H 2 ) or oxygen ( O 2 ), then it is said to be homonuclear .
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
Halogens are usually diatomic. Triatomic (composed of three atoms). Examples include O 3 . Tetratomic (composed of four atoms),Heptatomic(consisting 5 atoms), Hexatomic(consiting6 atoms), Septatomic(consisting 7 atoms), Octatomic(containing 8 atoms) Atomicity may vary in different allotropes of the same element.
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Homonuclear diatomic molecules (1 C, 7 P) Pages in category "Diatomic molecules" The following 29 pages are in this category, out of 29 total.
This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.
At over 1.9 × 10 19 years, over a billion times longer than the estimated age of the universe, bismuth-209 has the longest known alpha decay half-life of any isotope, and is almost always considered on par with the 80 stable elements. [7] [8] The heaviest elements (those beyond plutonium, element 94) undergo radioactive decay with half-lives ...