Which element in the fourth period exhibits the lowest second ionization enthalpy?
Potassium (K)
Calcium (Ca)
Gallium (Ga)
Krypton (Kr)
Related Questions
Mendeleef’s Periodic Table is upset by the fact that
Arranging elements solely by increasing atomic weight leads to some elements being out of order in terms of their properties.
The discovery of noble gases completely disrupted the order of the periodic table.
Elements with similar atomic weights always have similar properties.
Mendeleev did not account for the existence of isotopes.
The element with atomic number 19 belongs to which period?
2
3
4
5
An element with atomic number of 50 belongs to
s – block
p – block
d – block
f – block
Which of the following properties generally increases across a period from left to right in the periodic table?
Atomic radius
Metallic character
Electronegativity
Number of valence electrons
Among the following most metallic element is
Mg
Li
K
Ca
Elements of group 1 and group VI in the periodic table have one thing common. That is with the increasing atomic number, the:
Maximum valency increases
Reactivity increases
Atomic radius increases
Oxidizing power increases
Which of the following pairs has both members of the same period of the Periodic Table?
An element has E.C. predict their period, group and block
period = 3, block = p, group = 15
period = 5, block = s, group = 1
period = 3, block = p, group = 10
period = 4, block = d, group = 12
The element with atomic number 36 belongs to which block and period of the periodic table?
s-block, 4th period
p-block, 4th period
d-block, 5th period
f-block, 6th period
Which of the following properties generally decreases across a period from left to right, but shows an anomalous increase at Group 15 elements compared to Group 14 and 16 elements?
Ionization enthalpy
Atomic radius
Electronegativity
Electron gain enthalpy
