Advertisements
Advertisements
प्रश्न
Electropositivity means ______.
Advertisements
उत्तर
Electropositivity means the tendency of an atom of an element to form cation by losing its valence electrons.
APPEARS IN
संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Cl, F, Br, I (increasing order of electron affinity)
Name any five periods properties.
How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.
Nature of oxides of the elements ?
Arrange the elements of group 17 and group 1 according to the given conditions.
Increasing non – metallic character
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
Explain
Larger the atomic size, more metallic is the element.
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
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.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
Silicon is a metallic element.
Write an Explanation.
Electronegativity
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
The lightest liquid metal is ______
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Which of the following set of elements is written in order of their increasing metallic character?
