A report on Periodic table
Tabular display of the chemical elements.
- Periodic table90 related topics with Alpha
Chemical element
42 linksSpecies of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species.
Species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species.
Much of the modern understanding of elements developed from the work of Dmitri Mendeleev, a Russian chemist who published the first recognizable periodic table in 1869.
Metal
13 linksMaterial that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
Material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
Around 95 of the 118 elements in the periodic table are metals (or are likely to be such).
Isotope
14 linksIsotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei.
Electron configuration
13 linksDistribution of electrons of an atom or molecule in atomic or molecular orbitals.
Distribution of electrons of an atom or molecule in atomic or molecular orbitals.
Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements.
Block (periodic table)
14 linksA block of the periodic table is a set of elements unified by the atomic orbitals their valence electrons or vacancies lie in.
Atom
14 linksSmallest unit of ordinary matter that forms a chemical element.
Smallest unit of ordinary matter that forms a chemical element.
While experimenting with the products of radioactive decay, in 1913 radiochemist Frederick Soddy discovered that there appeared to be more than one type of atom at each position on the periodic table.
Nonmetal
9 links[[File:Nonmetals in the periodic table.png|thumb|upright=0.85|
[[File:Nonmetals in the periodic table.png|thumb|upright=0.85|
Extract of periodic table showing how often each element is classified as a nonmetal:
Glenn T. Seaborg
10 linksAmerican chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry.
American chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry.
His work in this area also led to his development of the actinide concept and the arrangement of the actinide series in the periodic table of the elements.
Uranium
11 linksChemical element with the symbol U and atomic number 92.
Chemical element with the symbol U and atomic number 92.
It is a silvery-grey metal in the actinide series of the periodic table.
Alkali metal
16 linksThe alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
Together with hydrogen they constitute group 1, which lies in the s-block of the periodic table.