Special:UnAnsweredQbut number 117 (discovered this month May 2010 by international science group, Ru+GB+VS) is still disputable.
i don't know the scientist but it is the periodic table of the elements
he drew up a table that grouped elements according to their atomic weights, his table became the basis for the periodic table of elements used today.
Dmitri Mendeleev is known as the father of the periodic table of elements. He arranged the elements in order of increasing atomic weight and grouped them based on similar properties. Mendeleev's periodic table laid the foundation for the modern periodic table we use today.
The elements are arranged in order according to the atomic number. The periodic table is arranged so that the elements in each column have similar chemical properties.
Dmitri Mendeleev's arrangement of elements is called the periodic table. He organized the elements based on their atomic mass and chemical properties, leading to the development of the modern periodic table used today.
No there are still undiscovered elements
Mendeleev's periodic table contained 63 elements because it was based on the elements known at the time, which were primarily discovered in the 19th century. Mendeleev organized these elements by increasing atomic mass and grouped them according to similar chemical properties. His table was groundbreaking, but many elements that exist today had not yet been discovered or isolated when he published his work in 1869. Additionally, the understanding of atomic structure and the periodic law evolved over time, leading to the discovery of new elements and the eventual expansion of the periodic table.
92 elements occur naturally on the periodic table.
A group in the periodic table is a column of elements that share similar chemical properties due to having the same number of electrons in their outer energy level. Groups are vertical columns and are numbered from 1 to 18.
Dmitri Mendeleev is known as the father of the periodic table. He developed the periodic table by arranging elements based on their atomic mass and chemical properties, establishing the foundation for the modern periodic table used today. Mendeleev's table had gaps for undiscovered elements, which were later found and filled, validating his organization of the elements.
Today (June 2013) the periodic table contain 118 chemical elements, natural or artificial.
Mendeleev arranged the elements in his periodic table in order of increasing atomic mass while also grouping elements with similar properties together. His periodic table laid the foundation for the modern periodic table we use today.