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प्रश्न
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
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उत्तर
- The periodic table is based on the atomic number of an element.
- Furthermore, the valence electrons determine their position in the group.
- Elements with one valence electron are classified as the first group, elements with two valence electrons as the second group, and vice versa.
- An element with 8 valence electrons belongs to the Periodic Table's last group (18th group) (excluding He).
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
Name the scientist who stated the modern periodic law.
Name two elements in halogens.
Name the type of elements which have one electron short of octet.
Give the symbol and valency of the following element and radical.
Ammonium
Give the chemical formula of magnesium nitrate
Elements in the modern periodic table are arranged in ______groups and______ periods.
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).
