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Question
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-metal
Solution
The most reactive non-metal: Fluorine
Concept Insight: Fluorine is most reactive non metal as it requires only one electron to complete its octet and become stable.
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RELATED QUESTIONS
Give the trend in metallic character:
down the group top to bottom.
Which has the maximum metallic character Na, Li or K?
Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Select the correct answer
Which of the following electronic structure is of a metal?
Select the correct answer
Configuration of an element is 2, 8, 1. Which of the following statement is true?
Within a group, where would you expect to find the element with the greatest metallic character.
Refering to changes in the properties of elements on moving from left to right across a period of the periodic table. Choose the correct answer.
The non-metallic character of the elements :
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.
On moving down the group metallic character increases.
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
