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प्रश्न
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
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उत्तर
The elements at the end of the period have 8 electrons in the valence shell.
Ne = 2, 8
Ar = 2, 8, 8
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संबंधित प्रश्न
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?
(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases
Why sodium element of group 1 and chlorine element of group 17 both have valency 1?
How does the number of:
valence electrons and
How does the number of:
valency vary on moving from left to right in the second period of the periodic table?
Explain
Size of atom changes when it loses or gain electron
Atomic number of an element is 16. State
- the period to which it belongs
- the number of valence electrons
- whether it is a metal or non-metal
Arrange the following in order of increasing radii:
N, O, P
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
Name or state following with reference to the element of the first three periods of the periodic table.
A covalent compound formed between an element in period 1 and a halogen.
