__________________ lie at the centre of the periodic table between metals on the left and non-metals on the right.
Alkali metals
Alkaline earth metals
Transition elements
Noble gases
________________ are good reducing agents.
Halogens
Oxygen
_______________including alkali metals and alkaline earth metal are in the extreme left of the periodic table.
Metals
Non-metals
Metalloids
Insulators
_____________ are good oxidising agents.
_______________ are all metals and chemically very reactive.
Transition metals
Inner transition elements
Post transition elements
The elements in the period 7 from thorium to lawrencium are called
Lanthanides
Actinides
The properties which repeat themselves at regular intervals are called
Periodic properties
Alternate properties
Gaseous properties
Physical properties
_________are placed in the upper right hand corner of the modern periodic law.
Semimetal
_________ arranged elements in increasing order of atomic numbers in horizontal rows and vertical columns.
Rutherford
Mendeleev
Moseley
Newland
Elements in the sixth period from cerium to lutetium are known as
