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प्रश्न
What is the number of elements in the 3rd period, of the modern periodic table?
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उत्तर
There are eight elements in the third period.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Explain why, the noble gases are placed in a separate group.
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
State its position in the periodic table?
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Give the symbol and valency of the following element and radical.
Carbonate
The modern periodic table has 1 to 7 periods.
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
Name the non-metals in the first twenty elements.
