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

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

Along the period, which one of the following decreases:

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

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

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

Which elements are present in 2^nd period

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

Elements with atomic No 90 to 103 are called:

How many groups are present in the modern periodic table?

How many periods are present in the modern periodic table?

Mendeleev’s periodic table was based upon the

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

Electron affinity of fluorine in kjmil-1 is

Mark the incorrect statement about ionization energy:

The atomic radii of the elements in periodic table

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

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

How many elements present in 7^th period?

Unit of electron affinity is ___________

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

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

Atomic number of lanthanum is:

Group-17 elements are known as:

How many elements present in 1^st period?

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

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

Normal elements are belonged to:

Period number tells about the:

The horizontal lines present in the periodic table are called ________

The vertical columns present in the periodic table are called __________

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

The first ionization energy of sodium atom is ______

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

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

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

Atomic size of lithium is ___________

The elements or group 3 to 12 are called:

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

Which element has high value of electro negativity ?

Unit of atomic size is _________

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

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

All transition elements are belonged to:

Which elements are present in 1st Group

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

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

Who were trying to convert inferior metals to superior metals?

Long form of periodic table is constructed on the bases of

Elements of a period show properties?

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

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

Atomic size of Neon is ____________

Who are arranged the elements in groups of three

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

How many elements present in 6^th period?

In which year Mendeleev described his periodic law?

The unit of ionization energy is:

Transition elements are:

Group-1 is also called:

Lanthanides series is started from the elements:

All transition elements are _________ .

Atomic number of actinium is:

How many elements block present in modern periodic table?

Lanthanide is belonged to period:

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

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

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

Point out the incorrect statement about electron affinity

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

Element with Atomic no 58 to 71 are called:

Which element are present in group-1?

The elements of a group show __________ properties:

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

In which year Moseley described his periodic law?

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

Group number tells about the:

When we move from top to bottom ionization energy __________ .

Actinide series is started from the elements:

Actinides are belonged to period: