The arrangements of elements in a group of three is known as?
Newland's Law
Dobereiner's Triads
Mendeleev's Law
Modern Periodic Law
Which scientist discovered that atomic number is the fundamental property of an element?
Bragg
Proust
Hund
Moseley
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
d - block elements are called?
Transition elements
Inert gases
Halogens
Alkali metals
Group 2 elements are calle?
Noble gases
Alkaline earth metals
Elements present in groups 3 to 12 in the middle of the periodic table are called?
The number of periods in modern periodic table?
12
8
7
14
The group in which all elements are gases at room temperature is ?
Group 18
Group 3
Group 12
Group 5
The elements with atomic numbers 90 to 103 are called?
Actinides
Lanthanides
