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
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Arrange the following as per the instructions given in the brackets:
Cl, F, Br, I (increasing order of electron affinity)
Name any five periods properties.
How does the chemical reactivity of
alkali metals vary?
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
In Period 3, the most metallic element is ______.
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?
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
The tendency of an element to form cation is the ______ character of that element.
Electropositivity means ______.
Write the name.
The atom having the smallest atomic radius from zero group.
Write an explanation.
Electronegativity
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Metals are good ______ (oxidising agents/reducing agents) because they are electron ______ (acceptors/donors).
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
