Which sequence of ionisation potential is correct -
B < Be
Be < B
Be = B
None
The elements of the group 16 are also called
Halogens
Noble gases
Chalcogens
Alkaline earth metals
Elements of which group form anions most readily -
Oxygen family
Nirogen group
Alkali metals
The element smallest in size is
Sodium
Ceasium
Barium
Magnesium
About how many known elements are there -
10
50
100
200
The element with atomic number 9 resembles with the element having atomic number
8
17
36
27
Which of the following is correct regarding ionic radii?
Ti4+ < Mn+7
35 Cl- < 37 Cl-
K+ > Cl-
P3+ > P5+
Which of the following properties generally decrease along a period?
Atomic size
Non - metallic character
Metallic character
Both (1) and (3)
An element M has an atomic number 9 and atomic mass 17. Its ion will be represented by-
M
M-
M2+
M2-
Which of the elements has the least non-metallic character -
Fluorine
Chlorine
Bromine
Iodine
