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प्रश्न
With reference to the variation of properties in the Periodic table, which of the following is generally true?
पर्याय
Atomic size increases from left to right across a period.
Ionization potential increases from left to right across a period.
Electron affinity increases going down a group.
Electro-negativity increases going down a group.
उत्तर
Ionization potential increases from left to right across a period.
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संबंधित प्रश्न
The elements 4Be, 12Mg and 20Ca, each having two valence electrons in their valence shells, are in periods 2, 3 and 4 respectively of the modern periodic table. Answer the following questions associated with these elements, giving reason in each case:
(a) In which group should they be?
(b) Which one of them is least reactive?
(c) Which one of them has the largest atomic size?
What is meant by 'group' in the modern periodic table? How do the following change on moving from top to bottom in a group?
(i) Number of valence electrons
(ii) Number of occupied shells
(iii) Size of atoms
(iv) Metallic character of element
(v) Effective nuclear charge experienced by valence electrons
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?
Name the element of lower nuclear charge out of Be and Mg.
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
Which type of ion will be formed by elements A, B, and C.
Write the electronic configuration of element 17T35.
- What is the group number of T?
- What is the period number of T?
- How many valence electrons are there in an atom of T?
- What is the valency of T?
- Is it a metal or non-metal?
- State number of protons and neutrons in T.
Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?
Name the elements in Period 1.
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 which is tetravalent.
State the following:
The group which contains highly electropositive metals including sodium.
