Electron affinity of fluorine in kjmil-1 is

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

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

In which year Moseley described his periodic law?

Atomic size of Neon is ____________

Atomic number of actinium is:

Actinides are belonged to period:

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

Actinide series is started from the elements:

Unit of atomic size is _________

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

Who are arranged the elements in groups of three

When we move from top to bottom ionization energy __________ .

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

Long form of periodic table is constructed on the bases of

Elements of a period show properties?

Lanthanides series is started from the elements:

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

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

The unit of ionization energy is:

Transition elements are:

How many elements block present in modern periodic table?

The vertical columns present in the periodic table are called __________

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

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

In which year Mendeleev described his periodic law?

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

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

Mendeleev’s periodic table was based upon the

Normal elements are belonged to:

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

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

How many elements present in 1^st period?

Unit of electron affinity is ___________

Lanthanide is belonged to period:

Group-1 is also called:

Which element has high value of electro negativity ?

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

All transition elements are belonged to:

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

Which elements are present in 2^nd period

Period number tells about the:

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

Point out the incorrect statement about electron affinity

Group-17 elements are known as:

How many elements present in 7^th period?

Along the period, which one of the following decreases:

Which element are present in group-1?

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

The elements of a group show __________ properties:

How many periods are present in the modern periodic table?

Group number tells about the:

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

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

The horizontal lines present in the periodic table are called ________

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

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

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

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

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

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

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

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

Mark the incorrect statement about ionization energy:

Atomic number of lanthanum is:

The atomic radii of the elements in periodic table

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

The elements or group 3 to 12 are called:

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

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

Which elements are present in 1st Group

Atomic size of lithium is ___________

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

Elements with atomic No 90 to 103 are called:

Element with Atomic no 58 to 71 are called:

How many elements present in 6^th period?

How many groups are present in the modern periodic table?

Who were trying to convert inferior metals to superior metals?

All transition elements are _________ .

The first ionization energy of sodium atom is ______