Periods and the vertical columns are groups
Rows are known as periods. They exist as horizontal lines. The bottom two rows are lanthanides and actinides.
The rows are called PERIODS
The two names for horizontal rows on the periodic table are periods and series.
The Periodic Table has 18 groups and 7 periods.
because they are of f group
In the periodic table of the elements there are 7 periods and 18 groups. The rows are called periods and columns are called groups. You may be getting confused by the lanthanides and actinides. These groups of elements are found in two rows at the bottom and seem to not be a part of the table. However, if you find and extended version of the table you will see that, technically, these two rows belong in Periods 6 and 7.
The two rows of elements placed below the periodic table are known as f block elements. The two rows are also known as lanthanides and actinides. In these elements, the electrons are filled in the antepenaltimate f orbital.
The two names for horizontal rows on the periodic table are periods and series.
There are two rows deprecated from periodic table because they have different properties.They are referred as lanthanides and actinides
Top row, of the bottom two rows on the Periodic Table. (Period 6, starting at group 4)
The Periodic Table has 18 groups and 7 periods.
The name of bottom two rows of the periodic table is lanthinedes and actinides.
Rows are known as periods. They exist as horizontal lines. The bottom two rows are lanthanides and actinides.
because they are of f group
In the periodic table of the elements there are 7 periods and 18 groups. The rows are called periods and columns are called groups. You may be getting confused by the lanthanides and actinides. These groups of elements are found in two rows at the bottom and seem to not be a part of the table. However, if you find and extended version of the table you will see that, technically, these two rows belong in Periods 6 and 7.
because they are less important metals
The special thing about the two rows directly below the periodic table is that they are lanthanoids and actinoids. They are both highly reactive with halogens and chalcogens. Actinoids react more easily, however.
The two rows of elements placed below the periodic table are known as f block elements. The two rows are also known as lanthanides and actinides. In these elements, the electrons are filled in the antepenaltimate f orbital.
This is so, because these rows separate f-block of the elements from other blocks.