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प्रश्न
Write an Explanation.
Electropositivity
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उत्तर
Electropositivity is the tendency of an atom to lose one or more electrons and form a positive ion (cation). Elements that easily donate electrons are called electropositive elements. Electropositivity increases down a group due to an increase in atomic size, and decreases across a period due to an increasing nuclear charge.
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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).
Answer the following in respect of element `31/15 P `
What is its valency?
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
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?
A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
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?
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 | 3 | 4 | 5 | 6 | 7 | 8 |
| H | He | ||||||
| A | B | ||||||
| C | D |
Will the most metallic element be found at A,B,C or D ?
In the third period, which is the most metallic and most non-metallic element?
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
Write the name.
The atom having the smallest atomic radius from zero group.
The metallic character of the element decreases moving across a period from left to the right.
On moving down the group metallic character increases.
Write scientific reason.
The metallic character of elements increases while going down the groups.
Which of the following set of elements is written in order of their increasing metallic character?
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:
Metals are good ______ because they are electron ______.
