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प्रश्न
What are horizontal rows and vertical columns in a periodic table known as?
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उत्तर
The horizontal rows are known as periods and vertical columns in the periodic table are known as groups.
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संबंधित प्रश्न
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
On the basis of electronic configuration, how will you identify the first element of a period?
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
How many periods and groups are there in the modern periodic table?
Name the cation and the anion in the salt – calcium sulphate
Give the chemical formula of calcium phosphate
______ and ______ are called inner transition elements.
In the modern periodic table, elements are arranged according to their ______
An element which is an essential constituent of all organic compounds belongs to
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 variable valency and is a member of the Oxygen family (group 16).
