The group in which all elements are gases at room temperature is ?
Group 18
Group 3
Group 12
Group 5
Group 18 elements are called?
Alkali metals
Halogens
Transition metals
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
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
d - block elements
p - block elements
s - block elements
f - block elements
According to Mendeleev, physical and chemical properties of elements are periodic function of ?
Atomic mass
Atomic number
Molecular mass
Molar volume
The number of periods in modern periodic table?
12
8
7
14
Which scientist discovered that atomic number is the fundamental property of an element?
Bragg
Proust
Hund
Moseley
How many elements are there in period of a periodic table?
8 elements
2 elements
3 elements
16 elements
The vertical columns in the modern periodic table is called?
Groups
Periods
Line
Class