How does the number of valence electrons vary on moving from left to right:
(i) In the first period of the periodic table?
(ii) In the second period of the periodic table?

Academic Chemistry NCERT Class 10

(i) The number of valence electrons increases from 1 to 2 in the 1st period of the periodic table.

(ii) The valence electrons increase from 1 to 8 in the 2nd period of the periodic table.

Tutorialspoint

e

Updated on: 10-Oct-2022

78 Views

How does the valency of elements change on moving from left to right in the third period of the periodic table?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
(a) How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?(b) What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How does the metallic character of elements change along a period of the periodic table from the left to the right and why?
On moving from left to right in a period in the periodic table, the size of the atom.increasesdecreasesdoes not change appreciablyfirst decreases and then increases/p>
How many metals are present in second period of periodic table?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
(a) List any three observations which posed a challenge to Mendeleev’s Periodic law.(b) How does the metallic character of elements vary on moving from(i) left to right in a period,(ii) from top to bottom in a group of the Modem Periodic Table?Give a reason for your answer.
(a) What is a period in a periodic table? How do atomic structures (electron arrangements) change in a period with increase in atomic numbers from left to right?(b) How do the following change on going from left to right in a period of the periodic table? (i) Chemical reactivity of elements (ii) Nature of oxides of elements Give examples in support of your answer.
(a) How does the electropositive character of elements change on going down in a group of the periodic table?(b) State how the valency of elements varies (i) in a group, and (ii) in a period, of the periodic table.
(a) How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table?(b) How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?
(a) What is the usual number of valence electrons and valency of group 18 elements of the periodic table?(b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
How does the valency of elements vary in going down a group of the periodic table?
Fill in the blanks in the following statements:(a) The horizontal rows in a periodic table are called ............... (b) In going across a period (right to left) in periodic table, the atomicExplain with the diagram:(a.) If the angle between the applied force and the displacement caused due to the force is 0°, then the displacement is in the same direction of the applied force.(b.)If the angle between the applied forc size of the atom ...............(c) On moving form right to left in the second period, the number of valency electrons ...............(d) On going down in a group in the periodic table, the metallic character of elements ...............(e) The tendency to gain an electron ............... on moving down in a group of the periodic table.

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements