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प्रश्न
What property do all elements in the same column of the Periodic Table as fluorine have in common?
उत्तर १
Valency equal to 1.
उत्तर २
All elements in the same group of the periodic table as fluorine are halogens. Halogens are placed in group 17 which have seven valence electrons. Hence, their valency is 1.
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संबंधित प्रश्न
In the classification of the them known elements, Mendeleev was guided by two factors. What are those two factors?
Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his periodic table?
In Mendeleev's periodic table, gap was not left for one of the following elements. This element is:
(a) gallium
(b) beryllium
(c) germanium
(d) scandium
Why could no fixed position be given to hydrogen in Mendeleev's periodic table?
The elements from the zero group are called _______.
Two elements in the same position : demerit of Newland's octaves : : place for Isotopes : _______
Find the odd one out and give its explanation.
Match the columns.
| Column A | Column B |
| 1) Eka-aluminium | a) Scandium |
| 2) Eka-Silicon | b) Gallium |
| 3) Eka- boron | c) Germanium |
| d) Beryllium |
Write the name.
The family of group 1 elements.
Match the column:
| Column ‘A’ | Column ‘B’ |
| Alkali metals | (a) Group 18 |
| Halogens | (b) Group 1 |
| Noble gases | (c) Group 17 |
