The elementsin the group number 18 are known as
Alkali metals
Alkaline earth metals
Halogens
Noble gases
_______________including alkali metals and alkaline earth metal are in the extreme left of the periodic table.
Metals
Non-metals
Metalloids
Insulators
______________ react with water to form strong alkalies.
Boron
Beryllium,Magnesium,Calcium,Strontium,Barium and Radon are collectively known as
Transition elements
_________are pure substances made up of one kind of atoms and cannot be broken down into simpler substances.
Elements
Compounds
Mixtures
Complexes
Second group elements are commonly known as
Lanthanides
The elements in the group number 17 are known as
_________________ lie at the bottom of the periodic table in two horizontal rows.
Inner transition elements
Post transition elements
Elements from group 3 to group 12 are collectively known as
______are known as zeroth group elements