Atomic number of lanthanum is:

In Periodic Table, 2^nd & 3^rd period are called _______

In which year Moseley described his periodic law?

Unit of electron affinity is ___________

Mendeleev arranged elements in his periodic table on the basis of:

The minimum amount o energy which is required to remove an electron from the gaseous state of an atom is called

Mark the incorrect statement about ionization energy:

How many elements present in 1^st period?

In which year Mendeleev described his periodic law?

In which century chemists devoted to arrange the elements in a systematic manner:

All transition elements are belonged to:

How many elements were present in Mendeleev’s periodic table?

Which element are present in group-1?

Unit of atomic size is _________

The group-1 and group-2 and group-13 to group-17 contain the elements:

Which elements are present in 1st Group

Groups-17 elements contains electrons in their outer most shell:

Which one of the following halogens has lowest electron-egativity?

Point out the incorrect statement about electron affinity

Normal elements are belonged to:

The ability of an atom to attract the shared pair of electrons toward, itself in a molecule is called:

When we move from left to right in a period atomic size is _____________

The distance between the Nuclei of two carbon atoms in its elements form is ___________

In which year Newland put forward his observation I the form of law of octaves?

How many elements present in 2^nd & 3^rd Period?

Period number tells about the:

Group-17 elements are known as:

Long form of periodic table is constructed on the bases of

How many elements present in 7^th period?

Along the period, which one of the following decreases:

How many electrons present in the valence shell of group-1 elements?

When we move from left to right in a period shielding effect is ___________

Elements are classified into four blocks depending upon the type of the

How many elements block present in modern periodic table?

Electron affinity of fluorine in kjmil-1 is

Elements of group 13 to 18 have their valence electrons in sub shell.

The amount of energy released when an electron is added in the outermost shell of an isolated gaseous atom is called

Elements of group 1 & 2 have their valence electrons in sub shell.

Who are arranged the elements in groups of three

Atomic size of lithium is ___________

The unit of ionization energy is:

Group-1 is also called:

Group number tells about the:

Elements with atomic No 90 to 103 are called:

The elements or group 3 to 12 are called:

With increase atomic number, the number of electrons in an atom also ______

The elements of a group show __________ properties:

Which elements are present in 2^nd period

Atomic size of Neon is ____________

The atomic radii of the elements in periodic table

When we move left to right in a period atomic number _________

Elements of a period show properties?

Transition elements are:

In modern periodic table the elements in a group do not have continuously increasing

Actinides are belonged to period:

Mendeleev’s periodic table was based upon the

1. Who determined the correct atomic masses of elements in 1860?

Lanthanide is belonged to period:

When we move from left to right in a period ionization energy is ___________.

How many elements present in 6^th period?

Moseley arranged the elements in his periodic table on the basis of:

Element with Atomic no 58 to 71 are called:

How many periods are present in the modern periodic table?

Atomic number of actinium is:

The horizontal lines present in the periodic table are called ________

When we move from top to bottom in a group shielding effect is ____________.

When we move from top to bottom in a group atomic size is __________.

4^th and 5^th period of the long form of periodic table are called

How many elements present in 4^th & 5^th Period?

All transition elements are _________ .

The first ionization energy of sodium atom is ______

Which period of the modern periodic table is considered as incomplete period

Which element has high value of electro negativity ?

Actinide series is started from the elements:

Lanthanides series is started from the elements:

How many groups are present in the modern periodic table?

The vertical columns present in the periodic table are called __________

Who were trying to convert inferior metals to superior metals?

The amount of energy given out when an electron is added to an atom is called ____________

When we move from top to bottom ionization energy __________ .