Advertisements
Advertisements
प्रश्न
Moving left to right in the second period, the number of valence electrons _____.
उत्तर
Moving left to right in the second period, the number of valence electrons increases from 1 to 8.
APPEARS IN
संबंधित प्रश्न
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
How do atomic structures (electron arrangements) change in a period with increase in atomic numbers from left to right?
How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this way?
An element A has atomic number 14. To which period does this element belong and how many elements are there in this period.
An element 'X' (Atomic number – 20) burns in the presence of oxygen to form a basic oxide.
(a) Identify the element and write its electronic configuration.
(b) State its group number and period number in the Modern Periodic Table.
(c) Write a balanced chemical equation for the reaction when this oxide is dissolved in water.
Arrange the following as per instruction given in the bracket.
Li, K, Na, H ( decreasing order of their potential ionisation )
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
The electronic configuration of an element is 2, 8, 4. State it:
group and period in the Modern Periodic Table.
The similarities in the properties of a group of elements are because they have the same ______.
