Who are arranged the elements in groups of three

How many groups are present in the modern periodic table?

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

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

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

Along the period, which one of the following decreases:

The vertical columns present in the periodic table are called __________

Which element are present in group-1?

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

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

The elements of a group show __________ properties:

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:

Which elements are present in 2^nd period

Atomic size of Neon is ____________

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

Mark the incorrect statement about ionization energy:

The atomic radii of the elements in periodic table

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

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

How many periods are present in the modern periodic table?

Lanthanides series is started from the elements:

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

All transition elements are _________ .

How many elements block present in modern periodic table?

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

In which year Mendeleev described his periodic law?

Who were trying to convert inferior metals to superior metals?

In which year Moseley described his periodic law?

Actinide series is started from the elements:

Which element has high value of electro negativity ?

Element with Atomic no 58 to 71 are called:

Elements with atomic No 90 to 103 are called:

All transition 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 top to bottom in a group atomic size is __________.

Group-17 elements are known as:

The horizontal lines present in the periodic table are called ________

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

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

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

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

Elements of a period show properties?

Long form of periodic table is constructed on the bases of

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

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

Mendeleev’s periodic table was based upon the

Actinides are belonged to period:

Unit of atomic size is _________

Point out the incorrect statement about electron affinity

How many elements present in 1^st period?

Electron affinity of fluorine in kjmil-1 is

Transition elements are:

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

How many elements present in 6^th period?

The unit of ionization energy is:

Atomic size of lithium is ___________

How many elements present in 7^th period?

Lanthanide is belonged to period:

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

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

Period number tells about the:

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

The elements or group 3 to 12 are called:

Normal elements are belonged to:

The first ionization energy of sodium atom is ______

Group number tells about the:

Atomic number of lanthanum is:

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

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

When we move from top to bottom ionization energy __________ .

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

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 ___________

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

Unit of electron affinity is ___________

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

Which elements are present in 1st Group

Atomic number of actinium is:

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