Advertisements
Advertisements
प्रश्न
Write a 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 an 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
Choose the word or phrase from the brackets which correctly complete the following statement:
Metals are good ______ (oxidizing agents/reducing agents) because they are electron ______ (acceptors/donors).
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Answer the following in respect of element `31/15 P `
What is its valency?
Name any five periods properties.
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
How does the chemical reactivity of
alkali metals vary?
Explain why the following statement is not correct:
All groups contain metals and non metals.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-metal
If an element is in group 7 is it likely to be metallic or non metallic in character?
The tendency of an element to form cation is the ______ character of that element.
Electropositivity means ______.
Electronegativity is the metallic property of an element.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
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?
Choose the odd one out and write the reason:
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
