Advertisements
Advertisements
Question
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.
Advertisements
Solution
a) The block shown by box A is s-Block.
S(16) = 2, 8, 6 (electronic configuration of any element in s block)
b) The block of element denoted by letter B is d – Block.
The period number of that element is 4.
APPEARS IN
RELATED QUESTIONS
Give the trend in metallic character:
down the group top to bottom.
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
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 ?
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
In Period 3, the most metallic element is ______.
In the third period, which is the most metallic and most non-metallic element?
Identify the metallic oxide which is amphoteric in nature.
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
The tendency of an element to form cation is the _______ character of that element.
The tendency of an element to form anion is the ______ character of that element.
Electropositivity means ______.
Electronegativity is the metallic property of an element.
Write an Explanation.
Electronegativity
Write scientific reason.
The metallic character of elements increases while going down the groups.
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
Three elements B, Si and Ge are
Choose the odd one out and write the reason:
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
