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प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
उत्तर
Periods have elements with consecutive atomic numbers.
संबंधित प्रश्न
An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason:
Write the position of P and Q in the Modern Periodic Table and the molecular formula of the compound formed when P reacts with Q.
An element A from group 14 of the periodic table combines with an element B from group 16.
(i) What type of chemical bond is formed?
(ii) Give the formula of the compound formed.
How did the early chemists classify elements?
Why was this basis of classification discarded for future classification of elements?
Example for liquid metal is ______.
Moseley’s periodic table is based on atomic mass.
An atom of an element has the electronic configuration 2,8,2. To which group does it belong?
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al
Identify and name the metals out of the following elements whose electronic configurations are given below.
- 2, 8, 2
- 2, 8, 1
- 2, 8, 7
- 2, 1
