MEDIUM

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Which one of the following statements is correct?
(i) Modern periodic table is based on atomic masses of elements.
(ii) $6^{th}$ period of the modern periodic table contains $32$ elements.
(iii) The valence cells of all the noble gases are completely filled with electrons.
(iv) Elements having $3$ valance electrons are placed in group $3$ in the modern periodic table.

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Important Questions on Classification of Elements and Periodicity in Properties

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Decrease in ionic size in a period is observed in

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

State modern periodic law.

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Consider the following radioactive decays

I. ${}_{92}U {\overset{- α}{⟶}}_{90} Th$ and

II. $_{90} Th \overset{- α}{⟶} {}_{88}{Ra}$

In which case group of parent and daughter elements remains unchanged.

HARD

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Five elements

A, B, C, D

and

E

have atomic numbers of

2, 3, 7,10

and

18

respectively. The elements which belong to the same period of the periodic table are:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The last element of the

p

- block in

6^{th}

period is represented by the outermost electronic configuration:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

What will be the

IUPAC

symbol and name for the element with atomic number

123

HARD

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

What would be the IUPAC name for the element with the atomic number

120

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following set of elements is not according with octave rule ?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Element with atomic number 35 belongs to

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The statement that is true for the long form of the periodic table is:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following pairs has both members from same group of periodic table?

HARD

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following atomic number represent a metal ?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following pairs has both members of the same period of the Periodic Table?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The elements with atomic numbers

9, 17, 35, 53

and

85

are all

HARD

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

A: The position of hydrogen atom in the modern periodic table is group

1

of the

1^{s t}

period only

R: Hydrogen atom has one proton with one neutron.

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

In which of the following period a maximum number of 32 elements are present

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Element with valence shell-electronic configuration as

d^{5} s^{1}

is placed in:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Without looking at the periodic table, select the elements of IIIA group of the periodic table (Atomic numbers are given)

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

According to modern periodic law, variations in the properties of elements is related to their

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which set does not show the correct match of ion and electronic configuration?

Important Questions on Classification of Elements and Periodicity in Properties

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