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प्रश्न
An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
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उत्तर
It is a Reducing agent.
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संबंधित प्रश्न
Elements in the same group show the same valency. Give scientific reason.
Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
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?
Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr:
| Li | Be |
| Na | |
| K | |
| Rb | |
| Cs | |
| Fr | Ra |
What happens to their metallic character?
State whether the following statement is true or false
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
How many elements are there in period 2?
Atomic number of an element is 16. State
- the period to which it belongs
- the number of valence electrons
- whether it is a metal or non-metal
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
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 |
One element of this period is missing. Which is the missing element and where should it be placed?
