One of the characteristic properties of non-metals is that they
are reducing agents
form basic oxides
form cations by electron gain
are electronegative
Which one of the following ions will be smallest in size ?
Na+
Mg2+
F-
In the periodic table from left to right in a period, the atomic volume
decreases
increases
remains same
first decrease then increases
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
Which block consists of lanthanide and actinide series placed at the bottom of the periodic table ?
s
p
d
f
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
In the modified form of Mendeleev's periodic table,all the known elements have been arranged in ten horizontal columns called
block
class
period
series
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
Which block consists of elements of groups 13(IIIA),14 (IVA) 15(VA),16(VIA),17(VIIA) and 18 ?
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy ?
Vanadium ( Z = 23 )
Chrmoium (Z = 24)
Iron (Z = 26)
Manganese (Z = 25)
