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प्रश्न
Write a scientific reason.
The non-metallic character increases while going from left to right in a period.
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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.
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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).
Is is metal or non-metal?
Give the trend in metallic character:
down the group top to bottom.
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 ?
How does the chemical reactivity of
alkali metals vary?
An element X belong to 3rd periods and group II of the periodic table state:
whether it is 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).
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?
Select the correct answer
Which of the following electronic structure is of a metal?
Identify the metallic oxide which is amphoteric in nature.
Match the atomic number with the following:
A metal of valency one.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
The tendency of an element to form cation is the ______ character of that element.
Write the name.
Two elements having two orbits.
Write scientific reason.
The metallic character of elements increases while going down the groups.
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
Choose the odd one out and write the reason:
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
