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Halogens

An element ha...

Question

An element having electronic configuration 2, 8, 7 will belong to _ and _ of modern periodic table.

A

3rd group, 7th period

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B

17th group, 2nd period

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C

7th group, 3rd period

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D

17th group, 3rd period

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Solution

The correct option is D 17th group, 3rd period

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Q. An element having electronic configuration 2, 8, 7 will belong to _____ and _____ of modern periodic table.

Q. An element in the periodic table has the electronic configuration of 2, 8, 7. Which of the following family does the element belong to?

(a) State modern periodic law.

(b) How does the electronic configuration of the atom of an element relate to its position in the modern periodic table?

(c) How could the modern periodic law remove various anomalies of Mendeleev’s periodic table? Explain with examples.

(d) Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?

(e) Name the scientist who prepared the modern periodic table.

Q. (a) What were the two major shortcomings of Mendeleev's periodic table? How have these been removed in the modern periodic table?
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