4 (including man-made metals)
There are 18 main groups in the modern periodic table of elements.
18
There are 18 groups in the periodic table of elements.
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
The group number tells you the number of valence electrons in the outer shell. This is important because it is the valence electrons that participate in bonding, and thus in determining the properties of the element.
There are 18 main groups in the modern periodic table of elements.
There are 18 groups and 7 periods in the modern periodic table.
Both arrange elements in groups of elements having similar properties.
Both arrange elements in groups of elements having similar properties.
18
7 periods and 18 groups are there on the modern periodic table.
There are 18 groups in the periodic table of elements.
There are 18 groups in the Periodic Table of elements.
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
The group number tells you the number of valence electrons in the outer shell. This is important because it is the valence electrons that participate in bonding, and thus in determining the properties of the element.
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 elements that are listed in vertical columns all share specific aspects. These aspects include having the same number of valence electrons and having similar chemical properties.