The first ionisation potential (in eV) of Be and B respectively are ____________

The ionisation potential of Na is 5.48 eV. The ionisation potential of K will be __________

Among the following which one has highest cation to anion ratio?

The ionic radii (in A) of N^-3, 0^-2 and P- are respectively _________

Among the elements Ca, Mg, P and CI the order of increasing atomic radii is ___________

The number of d- electrons in Fe⁺² (Z = 26) is not equal to the number of electrons in which one of the following?

Gadolinium belong to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

Element with atomic number 56 belongs to which block _________

Pick the incorrect statement about the factors affecting ionization energy

Which orbital diagram gives an insight to the highest ionization energy?

Which of the following sets contain only isoelectronic ions?

Ionic radii are ____________

Correct order of 1st ionization potential among elements Be, B, C, N, O is ___________

Which of the following statement is incorrect?

Which of the following atom has the lowest ionization enthalpy?

The radii of F, F^-, O and O^2- are in the order

Which of the following N^3-, O^2-, F^- is largest in size?

The effective nuclear charge across the period (from left to right)

Ionisation enthalpy is an _____ process.

Match the list I with List II and select the correct answer using. the code given below the lists.

Which of the following has the highest positive electron gain enthalpy?

Which set of elements shows positive electron gain enthalpy?

Which of the following processes involves absorption of energy?

In a group with decrease in electronegativity the metallic character
(a) decreases across a period
(b) increases down the group
(c) does not vary
Which of the above statement(s) is true

Among the elements given below,_____ has the highest value of electro negativity.

Which of the following property has no unit?

"The relative tendency of a bonded atom in a molecule to attract the shared pair of electrons towards itself" is termed as_____

With respect to chlorine, hydrogen will be __________

The most electronegative element of the periodic table is _______

Match the list I with list II and select the correct answer using the code given below the list.

Which of the following factor decreases across the period?

Which of the following statements are correct?
(i) Helium has the highest first ionisation enthalpy
(ii) Chlorine has less electron affinity than fluorine
(iii) Ne has more ionisation energy than Boron.
(iv) The ionisation energy of noble gases is zero

Which among the following has the highest ionisation energy _______________

Across the period, Ionisation energy _______

Arrange the following ions in order of decreasing ionic radius He, Li²⁺, Be³⁺

The elements having highest ionization energies within their periods are called _____

The correct order of size among Br, Br⁺, Br^- is __________

Which one among the following species has the largest atomic radius?

Which one among the following exhibits a valency greater than 4?

Pick the metalloid among the following elements ____________

The IUPAC name of element having atomic number 108 is ____________

Which pair of elements has the same characteristic chemical properties?

All the elements in a group in the periodic table have the same ____________

The oxidation state of alkali metal is _______

The element with atomic number 31 belongs to _____

The elements in which extra electrons enter into (n - 2) f-orbitals are called ____ elements.

d-block elements form _____ compounds.

The general electronic configuration of d-block element is _____

The general electronic configuration of p-block element is _____

The p-block elements comprise of group ____________

The general electronic configuration of s-block element is ______

Match the list I with list II and select the correct answer using the code given below the list.

Excluding hydrogen and helium, the smallest element in the periodic table is _____

Elements whose atoms have their s and p-sub-levels complete are the _____

Match the list I with List II and select the correct answer using. the code given below the lists.

The element with atomic number 103 is ______

Representative elements are those which belong to ____________

The metal which is a liquid at room temperature is _______

Group 16 of the periodic table is called as ____

The number of elements in the first period of the modern periodic table is _____

In the first transition series the incoming electron enters the ____________

Characteristic of transition elements is incomplete ____________

Halogens belong to the _____________

Which of the following set has atomic numbers of only representative elements?

Valence electrons in the atom of element A is 4 and in the element B is 2. Most probable compound fc from A and B is

Find the incorrect statement.

The elements eka aluminum and eka silicon named by Mendeleev known today as ___________

Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are ___________

Modern periodic law is ____________

X, Y and Z are three members of a Dobereiner's triad. If the atomic mass of X is 7 and that of Z is 39, what in the atomic mass of Y?

d-block elements form ____ compounds.

On moving diagonally across the periodic table, the second and third period elements show certain similarities. Pick out the pair which shows such a property.

The elements at the extreme left of periodic table has strong behaviour ______

Pd has exceptional electronic configuration of 4d¹⁰ 5s⁰ It belongs to period ______ and group _____

He is placed in ______ group.

______ is the lightest metal known.

The element with Z = 24 is placed in the _____ period

The first transition series is from _____ to _____

The electronic configuration of nitrogen is _____

Lithium shows diagonal relationship with _____

The element with atomic number 57 belongs to _____

The number of groups in the periodic table ___________

There are _____ periods in the periodic table.

The vertical columns in the periodic table are called as ___________

Consider the following statements according to modern periodic table.
(i) Modern periodic table contains 18 vertical columns and 7 horizontal rows.
(ii) The elements after uranium are called transuranium elements
(iii) The 17th group elements are called chalcogens
(iv) The elements of Groups 13 to 18 are called p-block elements.
which of the following statement(s) given above is/are correct.

Match the list I with list II and select the correct answer using the code given below the list.

The horizontal rows in the periodic table are called as ______

The atomic weight of Au is ______

______ proposed modern periodic law.

Law of octaves was proposed by _____

Law of triad was unable to explain for the element

An element M combines with Cl. What would be the formula of the compound obtained if M has a valence of 2?

What would be the formula of the compound formed by A and B, where A has the valence 3 and B has the valence 3?

The statement that is not correct for modern classification of element is
(1) The properties of elements are periodic function of these atomic numbers.
(2) The ionisation enthalpy of the elements generally increase with increase in atomic number
(3) For transition elements the 3d orbitals are filled after 3p-orbitals and before 4s orbitals.
(4) Fifth period contain 18 elements.

Which of the following is Dobereiner's triad?

Which of the following statement (s) about the Modern Periodic Table is are incorrect
i. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number.
ii. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses.
iii. Isotopes are placed in adjoining group (s) in the Periodic Table.
iv. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.

Match the list I with List II and select the correct answer using. the code given below the lists.

The first list of 23 chemical elements was published by _____ in the year 1789.

Period of an element is represented by _____ quantum number

Match the list I with List II and select the correct answer using. the code given below the lists.