State Modern Periodic Law. What is number of groups and periods in the Modern Periodic Table?

Answer : (c) The atoms lose their electrons more easily. (On moving from left to right across the periods of the periodic table, the non-metallic character increases. Hence, the tendency to lose...

Answer : The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2).

6 groups are there in the p-block

Modern Periodic law states that “the physical and chemical properties of the elements are periodic functions of their atomic numbers”. When atomic number is taken as fundamental property then abnormalities...

There are 18 groups and 7 periods in the Modern Periodic Table. (a) * Atomic size increase      *  Metallic character increases (b) * Atomic size decreases       * Metallic character decreases

Electronic configuration of Q : 2, 8, 3 Valency of Q: 3 Electronic configuration of R: 2, 8, 5 Valency of R: 8-5=3 P      +      S ----> PS 2,8,1     2,8,7

( a) no. Of electrons in atom of "A " will be only 12 as they are in third period and must have 3 shells and no. Of electrons in...

Mendeleev’s Periodic Table Modern Periodic Table Mendeleev's periodic table is based on atomic mass. Elements are arranged in increasing order of their atomic masses. Modern periodic table is based on atomic number. Elements are arranged...

Mendeleev’s periodic table                                      Modern periodic table.                ...

There are 18 groups and 7 periods in the Modern Periodic Table.  (i) # Atomic size increases # Metallic character increases  (ii) # Atomic size decreases  #  Metallic character decreases