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प्रश्न
How many periods and groups are there in the modern periodic table?
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उत्तर
Eighteen groups and seven periods
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Name the type of elements which have one electron short of octet.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
Give the chemical formula of ammonium sulphate
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
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 metalloids in the first twenty elements.
