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प्रश्न
State the property trends in general of elements on moving down in a group of the periodic table.
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उत्तर
Trends in a group:
- Number of shells and valence electrons: As we move down in a group the number of shells increase and valence electrons in a group remains the same.
- Valency: Valency of all elements is the same.
- Properties of elements:
(a) Metallic character increases,
(b) Non-metallic character decreases - Atomic size increases.
`"F>Cl>Br>I"/"Reactivity decreases"`
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संबंधित प्रश्न
Calcium is an element with atomic number 20. Stating reason, answer each of the following questions:-
(i) Is calcium a metal or a non-metal?
(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19?
(iii) Write the formula of its oxide.
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
What is its atomic number?
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name of the element,
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