Elements present in groups 3 to 12 in the middle of the periodic table are called?
Alkali metals
Transition elements
Halogens
Noble gases
The law used by Newlands to arrange elements is known as?
Law of triads
Mesdeleev's Law
Modern Periodic Law
Law of octaves
d - block elements are called?
Inert gases
The number of periods in modern periodic table?
12
8
7
14
Atomic radius of sodium in picometre is ?
99
132
143
190
Group 2 elements are calle?
Alkaline earth metals
Lanthamides and actinides are called
d - block elements
f - block elements
s - block elements
p - block elements
The number of outermost electrons present in the outermost shell of an atom is called?
Bonded electrons
Non-bonding electrons
Valence elctrons
Anti-bonding electrons
Group 1 and 2 elements are called
Lead
Tin
Iodines
Boron
