Periodic table (class 11)

The first four ionization energy values of an element are 191,578,872,and 5962 kcal. The number of balance shell in the element are

• 1

• 2

• 3

• 4

The trivalent ion having largest size in lanthanoid series is

• Ti

• Zr

• Hf

• La

Which is the correct order not stated properly?

• Ba >Sr> Mg, atomic radius

• F> O> N, first ionisation enthalpy

• Cl >F >I, electron affinity

• O> Se >Te, electronegativity

Which element has the lowest electronegativity

• Li

• F

• Fe

• Cl

Metallic and basic nature of the oxides _______ as we move along a period

• Increase

• Decrease

• Remains constant

• First increases then decreases

As we go from left to right in a period two of the periodic table, gram atomic number of the elements

• Will change indefinitely

• Decrease

• Increase at a constant rate

• First increase then decrease

The first ionisation enthalpies of two isotopes of the same elements are

• Same

• Different

• Some what different

• Don't know

Which of the following belengs to representative group

• Aluminium

• Chromium

• Argon

• Lanthanum

According to IUPAC nomenclature, a newly discovered element has been named "Uun".The atomic number of the element is ___

Which pair of atomic number represent some block

• 6,12

• 7,15

• 9,11

• None of these