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Modern Periodic Table

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Question

The following diagram showing part of the periodic table in which atomic radii of elements of group 17 are given. Which of the following elements has the lowest atomic radii?

A

Br

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B

F

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C

I

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D

Cl

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Solution

The correct option is B
F

Fluorine has the lowest atomic radii. As the atomic radii increases down the group.

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Q. The atomic radii in periodic table among elements from right to left:

Which of the following elements has the least atomic radii?

Q. (a) What is a group in the periodic table? In which part of a group would you separately expect the elements to have (i) the greatest metallic character (ii) the largest atomic size?
(b) In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
(c) From the standpoint of atomic structure, what determines which element will be the first and which the last in a period of the periodic table?
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Which one of the following group 17 elements has the smallest atomic radius?

Q. Which of the following statement is correct in regard to the classification of elements?

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(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
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(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.

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