Advertisements
Advertisements
प्रश्न
Write a scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Advertisements
उत्तर
- An atom's metallic nature is characterised by its propensity for losing electrons.
- Electrons are added to the same outermost shell as they move from left to right over time. At the same time, protons are added to the nucleus, increasing its charge.
- As a result of the higher effective nuclear charge, these electrons are attracted to the nucleus more strongly.
- As a result, it is more difficult to remove a valence electron from an atom.
Hence, metallic character goes on decreasing while going from left to right in a period.
संबंधित प्रश्न
Answer the following in respect of element `31/15 P `
What is its valency?
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Metallic character and non-metallic character are periodic properties discuss ?
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
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?
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
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 metal
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?
Identify the metallic oxide which is amphoteric in nature.
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.
The tendency of an element to form cation is the _______ character of that element.
Which of the following set of elements is written in order of their increasing metallic character?
Which of the following set of elements is written in order of their increasing metallic character?
Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
- The metal which exists in liquid state at room temperature
Which of the following metal (s) do not react with water?
