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In the modern periodic table, elements a...

In the modern periodic table, elements are arranged in

A

increasing mass

B

increasing volume

C

increasing atomic number

D

Alphabetically

Text Solution

Verified by Experts

The correct Answer is:
C
Increasing atomic number. Mosley found that atomic no. Was better fundamental properly than atomic weight.
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In the modern periodic table, the elements are arranged in the order of :

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: State the law on which modern periodic table is based.

Knowledge Check

  • Comprehension given below is followed by some multiple choice questions. Each question has one correct option. Choose the correct option. In the modern periodic table elements are arranged in order of increasing atomic numbers which is related to the electronic configuration . Depending upon the type of orbitals receiving the last electron the elements in the periodic table have been divided into four blocks viz, s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell . In accordance with the aufbau principle, the seven periods (1 to 7) have 2,8,8 ,18,18, 32 and 32 elements respectively . To avoid the periodic table being too long the series of f-block elements called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.

    A
    (i) The element with atomic number 57 belongs to
    (i) s-block
    ( b) p-block
    ( c) d- block
    ( d) f- block
    B
    (ii) The last element of the p-block in 6th period is represented by the outermost electronic configuration.
    `(a) 7 s^(2) 7p^(6)`
    `(b) 5f^(14) 6d^(10) 7s^(2) 7p^(0)`
    `( c) 4f^(14) 5d^(10) 6s^(2) 6p^(6)`
    `( d) 4f^(14) 5d^(10) 6s^(2) 6p^(4)`
    C
    (iii) Which of the elements whose atomic numbers are given below , cannot be accommodated the present set up of the long form of the periodic table ?
    ( a) 107
    ( b) 118
    ( c) 126
    ( d) 102
    D
    (iv) the elecronic configuration of the element which is just above the element with atomic number 43 in the same group is ………..
    `(a) 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5) 4s^(2)`
    `(b) 1 s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5) 4s^(3) 4p^(6)`
    `( c) 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3d^(6) 4s^(2)`
    `(d) 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6) 4s^(2)`

  • In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the pariodic table?

    A
    107
    B
    118
    C
    126
    D
    102

  • In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. The last element of p-block in 6th period is represented by the outermost electronic configuration.

    A
    `7s^(2)7p^(6)`
    B
    `5f^(14)6d^(10)7s^(2)7p^(0)`
    C
    `4f^(14)5d^(10)6s^(2)6p^(6)`
    D
    `4f^(14)5d^(10)6s^(2)6p^(4)`

    • Similar Questions

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    In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: How many groups are there in the modern periodic table?

    In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: What is the number of valence electrons in an element of group 1 and group 18 respectively?

    In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: What is the trend in the variation of valency while going down a group?

    In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: Which pair of elements do you think will have similar properties? a. Sodium and Argon b. Sodium and Potassium c. Potassium and Neon

    In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. The element with atomic number 57 belongs to:

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