Advertisements
Advertisements
प्रश्न
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
Advertisements
उत्तर
- While going from left to right in a period, electrons are added to the same outermost shell. At the same time, protons get added in the nucleus increasing the nuclear charge.
- Hence, these electrons experience greater pull from the nucleus due to increased effective nuclear charge.
- As a result, the ability of an atom to become anion by accepting outside electrons increases.
- The non-metallic character of an atom is its tendency to gain electrons.
Hence, non-metallic character increases while going from left to right in a period.
APPEARS IN
संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
Arrange the following as per the instructions given in the brackets:
Cl, F, Br, I (increasing order of electron affinity)
Answer the following in respect of element `31/15 P `
What is its valency?
Metallic character and non-metallic character are periodic properties discuss ?
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
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.
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
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?
If an element is in group 7 is it likely to be metallic or non metallic in character?
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.
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?
Write the name.
The atom having the smallest atomic radius from zero group.
Which of the following sets of atomic numbers belong to that of alkali metals?
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
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (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.
