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प्रश्न
In which part of a group would you separately expect the elements to have the largest atomic size?
उत्तर १
The largest atomic size is found at the bottom of the group, as the atomic size increases on moving down in a group of the periodic table.
उत्तर २
The largest atomic size can be expected in the lower part of the group.
संबंधित प्रश्न
An element 'M' with electronic configuration (2, 8, 2) combines separately with (NO3)–, (SO4)2– and (PO4)3– radicals. Write the formula of the three compounds so formed. To which group and period of the Modern Periodic Table does the element 'M' belong? Will 'M' form covalent or ionic compounds? Give reason to justify your answer.
The electrons in the atoms of four elements A, B, C and D are distributed in three shells having 1, 3, 5 and 7 electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of A and D and the molecular formula of the compound formed when A and D combine.
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
Classify the following elements into metals, non-metals and metalliods
As, C, Hg, Mg, S, Si
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
An element X belong to 4th period and 17th group, state.
no of valence electrons in it
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
Is it more or less reactive than calcium?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
State the number of elements in periods 1, Periods 2, and Period 3 of the periodic table. Name them.
Write two reasons responsible for late discovery of noble gases ?
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
To which period do these elements belong?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
Going across a period left to right, atomic size _____.
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
The similarities in the properties of a group of elements are because they have the same ______.
Name the elements in the correct order of their increasing atomic numbers present in the first, second, and third short periods of the periodic table.
State which of the elements are –
- metallic
- non-metallic
- noble gases
in each of the periods 2 and 3.
