The Periodic Table is only for elements while Ammonium is a compound radical or ion NH4+ it is combination of two elements nitrogen and hydrogen these two are in periodic table.
All of the others in the same row of the Periodic Table as sodium.
A period
Hydrogen is located on the first period; the first row in the periodic table.
Because they have the same valence number (+2)
The lanthanide elements are in a row at the bottom of the main part of most tables, this entire row being an extension of column 3 of the sixth period.
An elements period is its row in the Periodic Table.
An elements period is its row in the Periodic Table.
An elements period is its row in the periodic table.
a horizontal row is called a period.a vertical row is called a group
A row in the periodic table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
A horizontal row on the periodic table of elements is called a period.
Hydrogen is found in group 1 row 1 of the periodic table
A period is a row of elements on the periodic table.
A period is a row in the periodic table of elements.
In a periodic table a row is a period.