The gaps were left for elements which were not discovered at that time. The properties which were estimated for the elements at that time was same as found later in those elements.
Halogens are the most reactive non-metals on the periodic table.
Yes, each element on the periodic table has a unique name and chemical symbol.
Symbol
The alternative periodic table, such as the Janet or Left-Step periodic tables, may have unique features like organizing elements based on electron configurations or emphasizing the relationships between elements in different ways compared to the traditional periodic table.
The periodic table is a list of elements, unique atoms. There's nothing about them that can be described as male or female.
The periodic table organizes elements based on their unique properties and relationships to one another.
Lanthanides and actinides are placed below the periodic table because of their unique physical and chemical properties.
No, "jerktoum" is not a recognized element in the periodic table. The periodic table contains elements that are the building blocks of matter, each with a unique atomic number and chemical properties.
In chemistry, a family is a group of elements that have similar properties and react in a similar way. There are 18 families in the periodic table, each with their own unique characteristics and trends. These families are commonly referred to as groups and are labeled from 1 to 18 on the periodic table.
Very different. Each element is unique.
There are 18 subgroups (columns) on the periodic table, which are referred to as groups. Each group has a unique combination of elements with similar chemical properties.
It is placed in group 1, period 1 on the modern periodic table