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प्रश्न
Give two example of group 17 elements.
उत्तर
Chlorine (Cl) and bromine (Br) are two elements of group 17.
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संबंधित प्रश्न
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
State how the valency of elements varies in a period of the periodic table?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name the scientist who stated the modern periodic law.
Give the symbol and valency of the following element and radical.
Sodium
Write an Explanation.
Period
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
In the modern periodic table, elements are arranged according to their ______
