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प्रश्न
The arrangement of elements in the Modern Periodic Table is based on their ______.
विकल्प
increasing atomic mass in the period
increasing atomic number in the horizontal rows
increasing atomic number in the vertical columns
increasing atomic mass in the group
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उत्तर
The arrangement of elements in the Modern Periodic Table is based on their increasing atomic number in the horizontal rows.
Explanation:
Elements in the Long Form of the Periodic Table are arranged sequentially by their increasing atomic numbers from left to right along the horizontal periods.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
How were the positions of cobalt and nickel resolved in the modern periodic table?
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
State how the valency of elements varies in a group of the periodic table?
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the chemical formula of carbonic acid
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has a similar structure to diamond.
An element with atomic number ______ will form a basic oxide.
