At the end of each period is a noble element. It is non-reactive.
groupsi
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
The "borderline" elements on the periodic table are the diagonal row of elements that separates the metals from the non-metals. They are called metalloids and the amphoteric line.
The second row of the bottom 2 rows under the periodic table. (Period 7, starting at Group 4)
To find the period of an element on the periodic table, you look at the end of the row and see what number is there. For example, if your were trying to find the period of Oxygen, you would look all the way to the right or left side of the table and see what number there is, and you would find that oxygen is in period 2.
period
A horizontal row in the periodic table is called a period. There are seven periods in the periodic table, labeled from 1 to 7. Each period represents the energy levels of the elements within that row.
filled. That would be 2 electrons for helium, and 8 electrons for the rest of the noble gases in group 18 on the periodic table.
A row on the periodic table is a horizontal arrangement of elements that share similar properties. These elements have the same number of electron shells. Each row represents one energy level or electron shell in an atom.
Period
each row in the Periodic Table is called a period.
The Horizontal Rows are named 'PERIODS'. The Vertical Columns are named 'GROUPS'.
An elements period is its row in the Periodic Table.
An elements period is its row in the Periodic Table.
Each row on the periodic table is called a period, while each column is called a group.
An elements period is its row in the periodic table.
Those are columns.