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प्रश्न
Write the name.
The atom having the smallest atomic radius from zero group.
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उत्तर
Helium (He)
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संबंधित प्रश्न
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element B would have ______ metallic character than A.
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Name any five periods properties.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| H | He | ||||||
| A | B | ||||||
| C | D |
Will the most metallic element be found at A,B,C or D ?
Explain
Larger the atomic size, more metallic is the element.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last). Answer the following question in relation to the given group of elements:
Which element has the most metallic character?
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
Right or wrong sentence.
Silicon is a metallic element.
Write scientific reason.
The metallic character of elements increases while going down the groups.
3, 1, 2 electrons are in valence shells of X, Y, Z elements resp. From this information, write the name of the groups it belongs to and its valency.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Which of the following metal (s) do not react with water?
Choose the odd one out and write the reason:
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
