Why do we need periodic table

It is an Actinoid Metal with the symbol Lr. Nobelium No is a radioactive metal that has the atomic number in the periodic table, its appearance is not fully known due to the minuscule amounts produced of it. It is an Actinoid Metal with the symbol No. Mendelevium Md is a radioactive metal that has the atomic number in the periodic table, its appearance is not fully known due to the minuscule amounts produced of it.

It is an Actinoid Metal with the symbol Md. Fermium Fm is a silvery-white colored radioactive metal that has the atomic number in the periodic table. It is an Actinoid Metal with the symbol Fm. Einsteinium Es is a silvery-white colored radioactive metal that has the atomic number 99 in the periodic table. It is an Actinoid Metal with the symbol Es. Californium Cf is a silvery-white colored radioactive metal that has the atomic number 98 in the periodic table.

It is an Actinoid Metal with the symbol Cf. Berkelium Bk is a silvery colored radioactive metal that has the atomic number 97 in the periodic table. It is an Actinoid Metal with the symbol Bk. Curium Cm is a silvery-white colored radioactive metal that has the atomic number 96 in the periodic table.

It is an Actinoid Metal with the symbol Cm. Americium Am is a silvery colored radioactive metal that has the atomic number 95 in the periodic table. It is an Actinoid Metal with the symbol Am. Plutonium Pu is a silvery colored radioactive metal that has the atomic number 94 in the periodic table. It is an Actinoid Metal with the symbol Pu. Neptunium Np is a silvery colored radioactive metal that has the atomic number 93 in the periodic table.

It is an Actinoid Metal with the symbol Np. Protactinium Pa is a shiny silver colored radioactive metal that has the atomic number 91 in the periodic table. It is an Actinoid Metal with the symbol Pa. Thorium Th is a silvery-white colored radioactive metal that has the atomic number 90 in the periodic table.

It is an Actinoid Metal with the symbol Th. Actinium Ac is a silvery colored radioactive metal that has the atomic number 89 in the periodic table. It is an Actinoid Metal with the symbol Ac. Radium Ra is a silvery-white colored metal that has the atomic number 88 in the periodic table. It is an Alkaline earth Metal with the symbol Ra and is located in Group 2 of the periodic table.

Francium Fr is thought to be a gray colored metal that has the atomic number 87 in the periodic table. It is an Alkali Metal with the symbol Fr and is located in Group 1 of the periodic table. Radon Rn is a colourless, odourless, radioactive gas non-metal that has the atomic number 86 in the periodic table in Group It has the symbol Rn. Astatine At is a radioactive non-metal that has the atomic number 85 in the periodic table in Group It has the symbol At.

Polonium Po is a silvery-gray metal that has the atomic number 84 in the periodic table in Group It has the symbol Po. Bismuth Bi is a hard steel-gray metal that has the atomic number 83 in the periodic table in Group It has the symbol Bi. Lead Pb is a soft gray metal that has the atomic number 82 in the periodic table in Group It has the symbol Pb. Thallium Tl is a soft gray metal that has the atomic number 81 in the periodic table in Group It has the symbol Tl.

Mercury Hg is a liquid silver coloured metal that has the atomic number 80 in the periodic table. It has the symbol Hg. Gold Au is a soft gold coloured metal that has the atomic number 79 in the periodic table.

It has the symbol Au. Platinum Pt is a heavy white metal that has the atomic number 78 in the periodic table. It has the symbol Pt. Iridium Ir is a heavy white metal that has the atomic number 77 in the periodic table.

It has the symbol Ir. Osmium Os is a hard fine black powder or blue-white metal that has the atomic number 76 in the periodic table. It has the symbol Os. Rhenium Re is a silvery-white coloured metal that has the atomic number 75 in the periodic table. It has the symbol Re. Tungsten W is a steel-gray coloured metal that has the atomic number 74 in the periodic table.

It has the symbol W. Tantalum Ta is a gray coloured metal that has the atomic number 73 in the periodic table. It has the symbol Ta. Hafnium Hf is a silvery coloured metal that has the atomic number 72 in the periodic table. It has the symbol Hf. Lutetium Lu is a silvery-white coloured metal that has the atomic number 71 in the periodic table. It is a Lanthanide metal. It has the symbol Lu. Ytterbium Yb is a silvery coloured metal that has the atomic number 70 in the periodic table.

It has the symbol Yb. Thulium Tm is a silvery coloured metal that has the atomic number 69 in the periodic table. It has the symbol Tm. Erbium Er is a silvery coloured metal that has the atomic number 68 in the periodic table. It has the symbol Er. Holmium Ho is a silvery coloured metal that has the atomic number 67 in the periodic table.

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Undergraduate Student Member. Benefits Enjoy these benefits no matter which membership you pick. Thank you! Periodic Table The periodic table is an icon.

Credit: Yang H. Subscribe ». Credit: Dmitri Mendeleev. Dmitri Mendeleev's first published table included all the known elements and left space for the elements his periodic system predicted were still undiscovered.

The periodic table on the website of the International Union of Pure and Applied Chemistry avoids making a decision about whether La and Ac or Lu and Lr are group 3 elements.

The left-step periodic table, invented by Charles Janet, is strictly based on atomic orbitals and electron-filling order. You might also like Periodic Table. Periodic Table Ceiling, Elemental Pups. Exploring the superheavy elements at the end of the periodic table. Share X. To send an e-mail to multiple recipients, separate e-mail addresses with a comma, semicolon, or both.

Title: The periodic table is an icon. Submit Sending Gerald Eadie January 8, PM. For proponents of the Left Step periodic table, it is not necessary to calculate g-block and the matching s-p-d-f components. Paul Eckler January 9, PM. The periodic table is a popular symbol of chemistry.

But why should we have only one? Why not allow those who specialize to design their own for their own purposes? Chuck Schroer January 9, PM. I'm just wondering if there is a more three dimensional approach that needs to be developed to better show the elemental associations. A linear table might be too restrictive?

Maybe a spherical concept or pyramidal one? Maybe an ellipsoid I think sometimes we get caught up in one way of looking at things when using another way could be more helpful. I am not an expert, I just have a feeling that those who are trying to build this puzzle are looking at it the wrong way. Eisa M March 15, AM. Recently thought the same! Sadly think that the leading representation of data has to shift to 3D before it becomes 'the' "table".

Robert Parsons January 9, PM. I wonder if it might it not be more accurate at least for now to say that most of the transuranic elements were "invented" rather than "discovered.

While it is certainly possible that all these higher MW synthesized elements might exist naturally somewhere in the universe perhaps within the hearts of stars , it is unlikely that any of them exist naturally on Earth and it is also possible that none of them exist naturally anywhere. The periodic table is best viewed as a paradigm of chemistry. The pictorial representation of this concept has varied over time and is still evolving.

The periodic table of the elements describes the atomic structure of all elements that are known to mankind. For instance, by looking at the periodic table, a person can find out how many electrons the element has and how much it weighs. Each element has its own separate set of such data; no two elements are the same. Thus, if someone is uncertain what matter he has, he can look at the atomic structure of the material, compare it to the information in the periodic table, and identify the material by matching it to the element on the table with the same data.

The elements in the periodic table are grouped in particular families and periods vertical and horizontal rows. The elements in each family or period have similar or dissimilar characteristics. The table thus is a quick reference as to what elements may behave the same chemically or which may have similar weights or atomic structures.

The information contained in the periodic table such as atomic weight and what elements are similar lets scientists know how the elements are put together atomically and how they will behave. Oct 19 Nov 02 Oct 15 Mar 10 Feb 28 Oct 21 The periodic table has come a long way since Russian chemist Dmitri Mendeleev first drew up the original sketches in While plenty has changed over the past years, including the addition of new elements such as Nihonium Nh , Moscovium Mc , Tennessine Ts and Oganesson Og in , the underlying concept of the periodic table retains its relevance and importance.

Mendeleev designed the periodic table as a way of systematically categorising elements according to atomic number, electron configuration and recurring chemical properties. This allows for the identification of elemental characteristics simply by analysing its position on the table.

In fact, the periodic table is so accurate that it allows scientists to predict the chemical and physical properties of elements that hadn't yet been discovered.