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प्रश्न
What is meant in the periodic table by a period?
उत्तर
In a periodic table, elements are arranged in the order of increasing atomic numbers in horizontal rows called periods.
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संबंधित प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What is the usual number of valence electrons in the atoms of the last element in a period?
What are the merits of the modern periodic table of elements?
Name two elements in each case:
Actinides
Name the type of elements which have two electrons in the outermost orbit.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Complete the following flow chart.
Distinguish between:
Group 17 - Group 18
Noble gases belong to______ group of the periodic table.
Which of the following statements about the Modern Periodic Table is correct:
