Which block consists of elements of group(IA)and (IIA) ?
s
p
d
f
In the periodic table from left to right in a period, the atomic volume
decreases
increases
remains same
first decrease then increases
Which one of the following ions will be smallest in size ?
Na+
Mg2+
F-
Which block consists of elements of groups 13(IIIA),14 (IVA) 15(VA),16(VIA),17(VIIA) and 18 ?
The first ionisation potential (in eV) of Be and B, respectively are
8.29, 9.32
9.32, 9.32
8.29, 8.29
9.32, 8.29
The horizontal columns in a periodic table are known as
group
period
class
block
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states ?
3d3 ,4s2
3d5 ,4s1
3d5 ,4s2
3d2 ,4s2
With which of the following electronic configuration an atom has the lowest ionisation enthalpy ?
1s2 ,2s2 2p5
1s2 ,2s2 2p3
1s2 ,2s2 2p5 3s1
1s2 ,2s2 2p6
The electronic configuration of an element is 1s2,2s2,2p6,3s2,3p3. What is the atomic number of the element, which is present just below the above element in the periodic table ?
33
34
36
49
