Now (January 2012) the periodic table of Mendeleev contain 118 chemical elements.
Tantalum
The elements in the third group of the periodic table are boron, aluminum, gallium, indium, and thallium. These elements have similar chemical properties due to their shared position in the periodic table. They are commonly referred to as Group 13 elements.
There are eight third period transition elements on the periodic table.
The third row of the periodic table contains elements with 3p electrons. Some examples of elements in this row are phosphorus, sulfur, and chlorine.
The fifty-third element in the periodic table is iodine, which has the chemical symbol I and atomic number 53. It is a halogen with properties similar to chlorine and bromine.
There are 8 elements in the third period of periodic table. The elements belong to group-1,2,13,14,15,16,17 and 18
Europium
Tantalum
The elements in the third group of the periodic table are boron, aluminum, gallium, indium, and thallium. These elements have similar chemical properties due to their shared position in the periodic table. They are commonly referred to as Group 13 elements.
Scandium and Yttrium
There are eight third period transition elements on the periodic table.
Neptunium is element 93.
The third row of the periodic table contains elements with 3p electrons. Some examples of elements in this row are phosphorus, sulfur, and chlorine.
Chlorine.
about one third of the periodic table, but the most common are:carbonhydrogennitrogenoxygen
Yes, certain elements in the periodic table, such as elements in the third row and beyond, can have an expanded octet, meaning they can have more than eight valence electrons in their outer shell.
The fifty-third element in the periodic table is iodine, which has the chemical symbol I and atomic number 53. It is a halogen with properties similar to chlorine and bromine.