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

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

Who were trying to convert inferior metals to superior metals?

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

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

How many elements present in 6^th period?

Lanthanides series is started from the elements:

Who are arranged the elements in groups of three

Element with Atomic no 58 to 71 are called:

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

All transition elements are _________ .

How many elements block present in modern periodic table?

Which elements are present in 1st Group

Lanthanide is belonged to period:

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

Atomic number of lanthanum is:

Transition elements are:

Point out the incorrect statement about electron affinity

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

Group-17 elements are known as:

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

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

How many groups are present in the modern periodic table?

Mendeleev’s periodic table was based upon the

Along the period, which one of the following decreases:

All transition elements are belonged to:

Elements with atomic No 90 to 103 are called:

The elements of a group show __________ properties:

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

The atomic radii of the elements in periodic table

The horizontal lines present in the periodic table are called ________

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

The elements or group 3 to 12 are called:

Mark the incorrect statement about ionization energy:

Actinide series is started from the elements:

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

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

Atomic size of lithium is ___________

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

Unit of atomic size is _________

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

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

In which year Mendeleev described his periodic law?

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

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

Which element are present in group-1?

In which year Moseley described his periodic law?

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

Period number tells about the:

Unit of electron affinity is ___________

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

Elements of a period show properties?

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

Atomic size of Neon is ____________

Group number tells about the:

How many elements present in 1^st period?

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

How many elements present in 7^th period?

How many periods are present in the modern periodic table?

The unit of ionization energy is:

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

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

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

The first ionization energy of sodium atom is ______

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

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

Which elements are present in 2^nd period

Electron affinity of fluorine in kjmil-1 is

Atomic number of actinium is:

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

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

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

Group-1 is also called:

The vertical columns present in the periodic table are called __________

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

Normal elements are belonged to:

Long form of periodic table is constructed on the bases of

Actinides are belonged to period:

Which element has high value of electro negativity ?

When we move from top to bottom ionization energy __________ .