enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Extended periodic table - Wikipedia

   en.wikipedia.org/wiki/Extended_periodic_table

   An extended periodic table theorizes about chemical elements beyond those currently known and proven. The element with the highest atomic number known is oganesson (Z = 118), which completes the seventh period (row) in the periodic table. All elements in the eighth period and beyond thus remain purely hypothetical.

3. List of chemical elements - Wikipedia

   en.wikipedia.org/wiki/List_of_chemical_elements

   118 chemical elements have been identified and named officially by IUPAC.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).

4. Periodic table - Wikipedia

   en.wikipedia.org/wiki/Periodic_table

   Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3 ; it is usually shown at the foot of the table to save horizontal space.

5. Period (periodic table) - Wikipedia

   en.wikipedia.org/wiki/Period_(periodic_table)

   A period on the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, elements in the same group (column) have similar chemical and physical properties, reflecting the periodic law.

6. Science (UIL test) - Wikipedia

   en.wikipedia.org/wiki/Science_(UIL_test)

   The test booklet includes a periodic table of the elements, including atomic weights and atomic numbers, plus other scientific relationships, such as the vacuum speed of light or the gravitational constant, which may be used by the student. Scratch paper is allowed in the contest, and notations may be made anywhere except on the answer sheet.

7. List of elements by atomic properties - Wikipedia

   en.wikipedia.org/wiki/List_of_elements_by_atomic...

   This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.

8. Periodic table (electron configurations) - Wikipedia

   en.wikipedia.org/wiki/Periodic_table_(electron...

   The construction of the periodic table ignores these irregularities and is based on ideal electron configurations. [2] Note the non-linear shell ordering, which comes about due to the different energies of smaller and larger shells.

9. Group 8 element - Wikipedia

   en.wikipedia.org/wiki/Group_8_element

   Group 8 is a group (column) of chemical elements in the periodic table. It consists of iron (Fe), ruthenium (Ru), osmium (Os) and hassium (Hs). [1] "Group 8" is the modern standard designation for this group, adopted by the IUPAC in 1990. [1] It should not be confused with "group VIIIA" in the CAS system, which is group 18 (current IUPAC), the ...