Which block consists of elements of group(IA)and (IIA) ?
s
p
d
f
Identify the correct order of the size of the following
Which block consists of elements of groups 13(IIIA),14 (IVA) 15(VA),16(VIA),17(VIIA) and 18 ?
First period contains
two elements
four elements
six elements
eight elements
Which electronic configuration of an element has abnormally high difference between second and third ionisation energy ?
The element with the atomic number 118, will be
alkali
noble gas
lanthanide
transition element
Which block consists of lanthanide and actinide series placed at the bottom of the periodic table ?
Correct order of Ist ionisation potential (IP) among following elements Be, B, C, N, O is
B < Be < C < O < N
B < Be < C < N < O
Be < B < C < N < O
Be < B < C < O < N
The electronic configuration of Cu (atomic number 29) is
1s2,2s2,2p6,3s2,3p6, 4s2,3s9
1s2,2s2,2p6,3s2,3p6, 3d10,4s1
1s2,2s2,2p6,3s2,3p6, 4s2,4p6, 5s2,5p1
1s2,2s2,2p6,3s2,3p6, 4s2,4p6, 3d3
