Question

/Properties of elements are a periodic

function of their atomic numbers.

1. मेंडेलीवहचा आवती ननयम / Mendeleev's periodic law.

2. आधनुनक आवती ननयम / Modern Periodic Law

3. न्यलूँड्सची अष्टके/ Newlands’ Law of Octaves

4. डोबरायनरची निके / Dobereiner’s Triads​

Answer 1

Answer:

1. मेंडेलीवहचा आवती ननयम / Mendeleev's periodic law

Answer 2

The Properties of elements are a periodic function of their atomic numbers is in Modern Periodic Law. Hence, Option 'B' is correct.

• Modern Periodic Table and Law was given by Henry Moseley.
• Modern Periodic Law states that the properties of elements are a periodic function of their atomic numbers.
• In this long form of the table, the horizontal rows are called periods and vertical columns are called groups.
• There are 7 periods and 18 groups in this long-form table.
• The principal quantum number(n) is the maximum value of the respective period.
• This long-form table consists of 108 elements in total including metals, non-metals, and metalloids.
• The whole table is divided into 4 blocks i.e. S-block, P-block, D-block, and F-block.
• S-block contains 2 groups (group 1 and group 2), P-block contains 6 groups (group 13 to 18), D-block contains 10 groups (group 3 to 12) and F-block contains Lanthanoids and Actinoids.

Thus, The Properties of elements are a periodic function of their atomic numbers is in Modern Periodic Law. Hence, Option 'B' is correct.

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