______________ is the amount of energy required to remove an electron from the outermost shell of an isolated atom.
Ionisation potential
Atomic radius
Electron affinity
Electronegativity
Elements from group 3 to group 12 are collectively known as
Noble gases
Alkali metals
Halogens
Transition elements
The vertical columns in the periodic table are called
Class
Rows
Periods
Groups
Each period begins with an element having _______________ electron in the outermost shell.
1
3
5
7
The elements in the period 7 from thorium to lawrencium are called
Lanthanides
Actinides
______are known as zeroth group elements
Alkaline earth metals
_______________including alkali metals and alkaline earth metal are in the extreme left of the periodic table.
Metals
Non-metals
Metalloids
Insulators
The elementsin the group number 18 are known as
Second group elements are commonly known as
_______________ are weak metals and metalloids.
Post transition elements
Inner transition elements