Yes, there were elements on the first Periodic Table. I believe that there are still elements on the periodic table.
Dmitri Mendeleev was the first scientist to create a periodic table of the elements similar to the one we use today. This table showed that when the elements were ordered by increasing atomic weight, a pattern appeared where properties of the elements repeated periodically.
They have simliar properties and same elements although later on more elements were added to the modern periodic table.=Both periodic tables have elements grouped by similar properties. Mendeleev's periodic table had elements arranged in order of increasing atomic mass in columns with similar properties. While many of the elements are in order of atomic mass on the modern periodic table, some are not, as the modern table has elements arranged in order of increasing atomic number.=
There are far to many elements following the 6th on in the Periodic Table. Included below is a link to a very nice Periodic table.
The Elements on the far right side of the Periodic Table of the Elements are known as the Nobel Gasses.
Elements are arranged into chemical families by their chemical properties. Some elements don't react, while others are very reactive, and some are good conductors of electricity.
Russian chemist Dmitri Mendeleev (1834-1907) published the first periodic table of elements in 1869.
Dmitri Mendeleev was the first scientist to create a periodic table of the elements similar to the one we use today. This table showed that when the elements were ordered by increasing atomic weight, a pattern appeared where properties of the elements repeated periodically.
They have simliar properties and same elements although later on more elements were added to the modern periodic table.=Both periodic tables have elements grouped by similar properties. Mendeleev's periodic table had elements arranged in order of increasing atomic mass in columns with similar properties. While many of the elements are in order of atomic mass on the modern periodic table, some are not, as the modern table has elements arranged in order of increasing atomic number.=
There are far to many elements following the 6th on in the Periodic Table. Included below is a link to a very nice Periodic table.
Copper has been mined for about 5,000 years so it's exact origin is unknown. Since copper was a known element at the time that Dimitri Mendeleev first laid out his periodic table in 1869, it was included in that first periodic table. Other elements that were unknown at the time, like helium, were not included.
The Elements on the far right side of the Periodic Table of the Elements are known as the Nobel Gasses.
Any atom in the first family of the periodic table of elements is very unstable.
The most reactive chemical elements are in the first group of the periodic table of elements.
Very different. Each element is unique.
Elements in group 18 of the periodic table.
The periodic table, in which the elements are very cleverly arranged in order of various things, such as electronegativity. It is more complicated that it first appears. Google it.
Elements are arranged into chemical families by their chemical properties. Some elements don't react, while others are very reactive, and some are good conductors of electricity.