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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Beryllium
Magnesium
Carbon
Oxygen
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उत्तर
Magnesium
Explanation:
Magnesium is placed in period 3, while others are placed in period 2 of the modern periodic table.
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संबंधित प्रश्न
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
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Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.
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Which of the above elements has the highest metallic character?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
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Write the scientific reason.
The third period contains only eight elements even though the electron capacity of the third shell is 18
An element has its electron configuration as 2, 8, 2. Now answer the following question.
With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Which pair of atomic numbers represents elements in the same group?
Find the odd one out and give its explanation.
Answer the following question in one sentence.
What determines the chemical reactivity of elements?
Write the name.
The element having stable electron configuration from the third period.
Write the name.
Highest electropositive element
Write the name.
The group of elements having electronic configuration 2, 2.
Right or wrong sentence.
The valency of the elements in group 2 is 1.
Right or wrong sentence.
The elements lithium and beryllium are in the same period because their valencies are similar.
Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.
- What is the atomic number of element A?
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Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?
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XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.
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