Along the period, which one of the following decreases:

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

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

Which elements are present in 1st Group

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

In which year Moseley described his periodic law?

Normal elements are belonged to:

In which year Mendeleev described his periodic law?

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

Which element are present in group-1?

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

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

Group-17 elements are known as:

When we move from top to bottom ionization energy __________ .

Who are arranged the elements in groups of three

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

Lanthanides series is started from the elements:

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

Long form of periodic table is constructed on the bases of

Which element has high value of electro negativity ?

The elements or group 3 to 12 are called:

Period number tells about the:

Elements with atomic No 90 to 103 are called:

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

The elements of a group show __________ properties:

Element with Atomic no 58 to 71 are called:

The atomic radii of the elements in periodic table

How many periods are present in the modern periodic table?

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

Transition elements are:

All transition elements are _________ .

Atomic size of lithium is ___________

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

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

Elements of a period show properties?

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

Atomic size of Neon is ____________

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

How many elements present in 7^th period?

How many elements present in 6^th period?

The first ionization energy of sodium atom is ______

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

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

Actinides are belonged to period:

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

How many elements present in 1^st period?

Lanthanide is belonged to period:

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

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

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

The vertical columns present in the periodic table are called __________

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

Which elements are present in 2^nd period

Who were trying to convert inferior metals to superior metals?

Mendeleev’s periodic table was based upon the

Mark the incorrect statement about ionization energy:

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

The unit of ionization energy is:

Group number tells about the:

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

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

Group-1 is also called:

Actinide series is started from the elements:

How many groups are present in the modern periodic table?

Unit of electron affinity is ___________

Atomic number of actinium is:

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

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

Electron affinity of fluorine in kjmil-1 is

Unit of atomic size is _________

Atomic number of lanthanum is:

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

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

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

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

All transition elements are belonged to:

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

The horizontal lines present in the periodic table are called ________

How many elements block present in modern periodic table?

Point out the incorrect statement about electron affinity