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प्रश्न
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
उत्तर
| Group I | Electronic configuration | Group II | Electronic configuration |
| Li (Lithium) | 2, 1 | Be (Beryllium) | 2,2 |
| Na (Sodium) | 2, 8, 1 | Mg (Magnesium) | 2,8,2 |
| K (Potasium) | 2, 8, 8, 1 | Ca (Calcium) | 2,8,8,2 |
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
What is the name of those elements which divide metals and non-metals in the periodic table?
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
Which element has two shells, both of which are completely filled with electrons?
What is the number of valence electrons in the atoms of first elements in a period?
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Give the symbol and valency of the following element and radical.
Nitrate
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
State the number of elements in Period 2 of the Periodic Table.
