Advertisements
Advertisements
प्रश्न
Write an explanation.
Electropositivity
Advertisements
उत्तर
Electropositivity is the tendency of an atom to lose one or more electrons and form a positive ion (cation). Elements that easily donate electrons are called electropositive elements. Electropositivity increases down a group due to an increase in atomic size and decreases across a period due to an increasing nuclear charge.
APPEARS IN
संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Cl, F, Br, I (increasing order of electron affinity)
Is is metal or non-metal?
Give the trend in metallic character:
down the group top to bottom.
Arrange the elements of group 17 and group 1 according to the given conditions.
Increasing non – metallic character
Write a scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
In Period 3, the most metallic element is ______.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
Which non-metallic element has the valency of 2?
For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.
| 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| H | He | ||||||
| A | B | ||||||
| C | D |
- Will the most metallic element be found at A, B, C or D?
- Will the most non-metallic element be found at A, B, C or D?
Identify the metallic oxide which is amphoteric in nature.
Match the atomic number with the following:
A metal of valency one.
On moving down the group metallic character increases.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Which of the following set of elements is written in order of their increasing metallic character?
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Three elements B, Si and Ge are
Metals are good ______ because they are electron ______.
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.
