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प्रश्न
Name an alkali metal in period 3 and halogen in period 2.
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उत्तर १
SOL: Na and F
उत्तर २
Period III alkali metal is sodium. Fluorine is a halogen found in period II.
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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.
How many rows and columns are there in the modern periodic table?
Which element has two shells, both of which are completely filled with electrons?
Name two elements in halogens.
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Aluminium
Give the symbol and valency of the following element and radical.
Bicarbonate
How does the property vary in periods and in groups?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
