There's no reason for it.It was built on the basis of increasing atomic number and then the similarities were observed. However you can say this is because of the presence of the metalloids present b/w them which form the zig-zag line.
The elements to the left of the zig zag line (amphoteric line) are the metals, to the right of the line are the non-metals. The elements that fall directly alongside the line are metalliods (boron, silicon, germanium, arsenic, antimony, tellurium) (sometimes polonium, astatine are included)
They are seperatec by a line that goes from under boron going across then down across then down until it reaches astatine. This spilts the non metals on the right and the metals on the left.
Yes the zig zag line does separate the non metals from the metals and the elements touching the zig zag line are called semi metals
The amphoteric line is a zig-zag line going down the periodic table which separates metals and non-metals
The zig zag lie comprises of metalloids. They separate transition elements and non-metals.
The zig-zag line (or sometimes known as the staircase) separates the metals in the periodic table from the non-metals. Metals are present on the left of the zigzag line and non metals to its right. The elements on the staircase are known as metalloids.
Elements to the left of the stair-step line are metals and to the right are the nonmetals.
If the stair step line on periodic table divide, then the elements to the left of this line are metals, except hydrogen
All of the metals on the periodic table are on the left side. Your periodic table probably has what looks like a broken diagonal line running around the middle. Everything to the left of this line (except hydrogen) is a metal.
The semi metals are called metalloids. They are present on zigzag line on periodic table.
Semi metals are present in zig-zag line in periodic table. It is towards right in periodic table.
If the stair step line on Periodic Table divide, then the elements to the left of this line are metals, except hydrogen
Nonmetals are located in the right corner of the periodic table of Mendeleev. See the link bellow for a periodic table. What? The nonmetals are located on the right of the periodic table, such as oxygen, nitrogen and chlorine.
Non metals
Non metals
in the zig zag line
The zig zag lie comprises of metalloids. They separate transition elements and non-metals.
On the left side of the stairs (or the zig zag line) on the periodic table.
The zig-zag line (or sometimes known as the staircase) separates the metals in the periodic table from the non-metals. Metals are present on the left of the zigzag line and non metals to its right. The elements on the staircase are known as metalloids.
Elements to the left of the stair-step line are metals and to the right are the nonmetals.
Metals are everything from the left side to a diagonal line between aluminum and bismuth.