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प्रश्न
Write the name.
The atom having the smallest atomic radius from zero group.
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उत्तर
The atom having the smallest atomic radius from zero group- Helium (He)
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संबंधित प्रश्न
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
Is it a metal or a non-metal?
An element X belong to 3rd periods and group II of the periodic table state:
whether it is a metal or a non-metal.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Which has the maximum metallic character Na, Li or K?
iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-metal
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Within a group, where would you expect to find the element with the greatest metallic character.
Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
| List | ||
| Calcium | Oxygen | Copper (II) Oxide |
| Carbon | Calcium hydroxide | Copper (II) Nitrate |
| Lead (II) Oxide | Hydrogen chloride | Chlorine |
| Lead (II) Nitrate | Calcium Oxide | Ammonium chloride |
- P is white solid. When heated produces white fumes (sublime).
- P and R on warming produce an alkaline gas.
- On adding water to T, heat is evolved and R is formed.
- Q burns brightly in the air to form T.
- When S is heated, it gives off brown fumes and leaves a black residue of U.
- A solution of S is formed by warming U with dilute nitric acid.
- V is a gaseous non-metallic element that reacts with hydrogen to form W.
- A solution of W will neutralize the solution of R.
The metallic character of the element decreases moving across a period from left to the right.
On moving down the group metallic character increases.
3, 1, 2 electrons are in valence shells of X, Y, Z elements. From this information, state the group in which they belong and write their valencies.
The lightest liquid metal is ______
