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प्रश्न
Name or state following with reference to the elements of the first three periods of the periodic table.
A metalloid in period 2 and in period 3.
उत्तर
Metalloid in period 2 is B (Boron) and in period 3 is Si (Silicon)
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संबंधित प्रश्न
Which of the following element does not lose an electron easily?
(a) Na
(b) F
(c) Mg
(d) Al
In each of the following pair, choose the atom having the bigger size:
Na (At. No. 11) or K (At. No. 19)
What do you understand by orbits?
Name two elements you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Why fluorine has higher E.N. than chorine?
Name the element of lower nuclear charge out of Be and Mg.
Name the elements in period 1.
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?
An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
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.
