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Jaiyush19
Jaiyush19
@jaiyush19
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Joined: Sep 10, 2021
Last seen: Jul 13, 2023
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Topics: 2159 / Replies: 16
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Topic
Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table? (b) Helium and neon are unreactive gases.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 107
Topic
How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way? (b) How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this w...
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 136
Topic
How does the atomic size vary on going down from top to bottom in a group of the periodic table? Why does it vary this way? (b) Lithium, sodium and potassium are all metals that react with water to liberate hydrogen gas.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 113
Topic
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements? (b) What is the number of elements in: (a) 1st period, and (b) 3rd period, of the modern periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 93
Topic
What are 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?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 115
Topic
What is the fundamental difference in the electronic configurations between the group 1 and group 2 elements? (b) On the basis of electronic configuration, how will you identify: (i) chemically similar elements? (ii) the first element of a period?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 87
Topic
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.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 83
Topic
Explain why: (i) All the elements of a group have similar chemical properties. (ii) All the elements of a period have different chemical properties. (b) The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 117
Topic
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...
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 104
Topic
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 tab...
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 108
Topic
An element X belongs to group 2 and another element Y belongs to group 15 of the periodic table: (a) What is the number of valence electrons in X? (b) What is the valency of X?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 98
Topic
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configurations of these two elements. Which of these will be more electronegative? Why?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 102
Topic
The horizontal rows in a periodic table are called………. (b) In going across a period (right to left)in periodic table, the atomic size of the atom
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 63
Topic
Rewrite the following statements after correction, if necessary: (i) Elements in the same period have equal valency. (ii) The metallic character of elements in a period increases gradually on moving from left to right.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 76
Topic
Arrange the following elements in the increasing order of their metallic character: Mg, Ca, K, Ga
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 89
Topic
Arrange the following elements in increasing order of their atomic radii: Li, Be, F, N
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 64
Topic
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 75
Topic
Name the element which is in: (a) first group and third period. (b) seventeenth group and second period.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 123
Topic
How does the valency of elements vary in going down a group of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 100
Topic
How does the valency of elements change on moving from left to right in the third period of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 86
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