Fill in the blanks.
1. The formula of chloride of metal M is MCl2. The metal M belongs to group 2.
2. 18th group in the periodic table contains elements that are all gases at room temperature.
3. The arrangement of elements in a group of three is known as traids.
4. The law used by Newlands to arrange elements is known as Newlands’ Octaves.
5. The element eka – aluminum in Mendeleev’s periodic table is known as Gallium in modern periodic table.
6. Elements showing properties of both metals and non – metals are known as metalloids.