Period 3 in the periodic table A period 3 element is one of the chemical elements in the third row (or period) of the periodic table of the chemical elements...

Period 4 in the periodic table A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the chemical elements...

Period 2 in the periodic table A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements...

Period 6 in the periodic table A period 6 element is one of the chemical elements in the sixth row (or period) of the periodic table of the chemical elements...

Period 7 in the periodic table A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the chemical...

Extended periodic table Element 119 (Uue, marked here) in period 8 (row 8) marks the start of theorisations. An extended periodic table theorizes about...

Period 5 in the periodic table A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the chemical elements...

Period 1 in the periodic table A period 1 element is one of the chemical elements in the first row (or period) of the periodic table of the chemical elements...

transition metal groups, where the lightest element is distinct from the very similar next two. All the group 3 elements are rather soft, silvery-white metals...

1926 (before the 1932 discovery of the neutron) for the hypothetical "element of atomic number zero" (with zero protons in its nucleus) that he placed...

A period on the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period...

expected to be an s-block element, an alkali metal, and the first element in the eighth period. It is the lightest element that has not yet been synthesized...

The Fifth Element is a 1997 English-language French science fiction action film conceived and directed by Luc Besson, as well as co-written by Besson...

antimony, and bismuth. Although each period 2 element from lithium to oxygen shows some similarities to the period 3 element in the next group (from magnesium...

formed the two worlds (mbûngi), and the path of the sun. Each element correlates to a period in the life cycle, which the Bakongo people also equate to the...

atomic number 3) is a soft, silvery-white alkali metal. Under standard conditions, it is the least dense metal and the least dense solid element. Like all...

elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period. It has attracted attention because...

An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment...

periodic table of the elements it is a p-block element, a member of group 18 and the last member of period 7. Its only known isotope, oganesson-294, is...

A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes...

infinite. The order of an element of a group (also called period length or period) is the order of the subgroup generated by the element. If the group operation...

registrant element, the publication element, and a checksum character or check digit. A 13-digit ISBN can be separated into its parts (prefix element, registration...

in the same period tend to have similar properties, as well. Thus, it is relatively easy to predict the chemical properties of an element if one knows...

extended periodic table with an additional period of 50 elements (thus reaching element 168); this eighth period was derived from an extrapolation of the...

transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are...

signification. Also given is each element's atomic number, atomic weight, or the atomic mass of the most stable isotope, group and period numbers on the periodic...

characteristic whereby each component element has 5 electrons in its valence shell, that is, 2 electrons in the s sub-shell and 3 unpaired electrons in the p sub-shell...

Peridotite Period 1 element Period 2 element Period 3 element Period 4 element Period 5 element period 6 element Period 7 element Period 8 element periodic...

joint-highest atomic mass of all known elements and is the penultimate element of the 7th period of the periodic table. It is named after the region of Tennessee...

In the periodic table, nihonium is a transactinide element in the p-block. It is a member of period 7 and group 13. Nihonium was first reported to have...