Advertisements
Advertisements
Question
Write scientific reason.
The metallic character of elements increases while going down the groups.
Advertisements
Solution
- While going down a group a new shell gets added, resulting in an increase in the distance between the nucleus and the valence electrons.
- This results in lowering the effective nuclear charge and thereby lowering the attractive force on the valence electrons.
- As a result of this, the tendency of the atom to form cation by losing electrons increases.
- The metallic character of an atom is its tendency to lose electrons.
Hence, the metallic character of elements increases while going down the groups.
APPEARS IN
RELATED QUESTIONS
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Give the trend in metallic character:
(i) across the period left to right
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 elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
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.
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
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?
In the third period, which is the most metallic and most non-metallic element?
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The element at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Within a group, where would you expect to find the element with the greatest metallic character.
The tendency of an element to form cation is the ______ character of that element.
Write the name.
The atom having the smallest atomic radius from zero group.
Write a scientific reason.
The non-metallic character increases while going from left to right in a period.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Choose the odd one out and write the reason:
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.
