This is a period.
The Periodic table is a representation of all elements grouped in a manner that lists elements with similar properties in columns. Adjacent columns have deceasing or increasing characteristics
Across any period, the properties of elements gradually change. This gradual change is called a periodic trend.
Protons gradually increase or decrease.
A Periodic table The Periodic Table of the Elements.
118 elements are in the periodic table of elements; some of them are still unnamed (January 2013).
no. A period is a row of elements in the periodic table whose properties change gradually and predictably.
The Periodic table is a representation of all elements grouped in a manner that lists elements with similar properties in columns. Adjacent columns have deceasing or increasing characteristics
Period in the periodic table.
Across any period, the properties of elements gradually change. This gradual change is called a periodic trend.
Protons gradually increase or decrease.
atomic number
A Periodic table The Periodic Table of the Elements.
By grouping the elements on the Periodic Table.
It is called the Periodic Table of Elements.
See the link below fot the IUPAC model of the periodic table of elements.
Elements of the Periodic Table
118 elements are in the periodic table of elements; some of them are still unnamed (January 2013).