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(i) How does the electronic configuratio...

(i) How does the electronic configuration of an atom relates to its position (period and group) in the modern periodic table ?
(ii) Would you place the two isotopes of chlorine, Cl -35 and Cl -37, in different slots because of their different atomic masses or in the same slot because their chemical properties are the same ? Justify your answer.

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(i) In the periodic table, elements are placed according to their electronic configuration. If an element has only one shell in its electronic configuration, it is placed in the first period. If the element has two shells then it is placed in the second period, and so on. Vertical columns in the periodic table are called groups.
There are eighteen groups and in a group, all the elements have same number of valence electrons.
(ii) They will be placed at the same slot as their atomic number is same, valence electron and valency are same and have same chemical properties.
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How does the electronic configuration of an atom related to its position in the modern periodic table ?

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(i) Why do we classify elements ? (ii) What are the two criteria used in the development of Modern Periodic Table ? (iii) State the position of (a) metals, (b) non-metals and ( c) metalloids in the periodic table. (iv) Would you place two isotopes of chlorine, Cl-35 and Cl-37 in different slots of the periodic table because of their different atomic masses or in the same slot because their chemical properties are same ? Justify your answer.

How does the electronic configuration of an atom of an element related to its position in the modern periodic table ? Explain with one example.

Consider the isotopes of chlorine, Cl- 35 and Cl-37. would you place them in different slots becauses their atomic masses are different ? Or would you place them in the same position because their chemical properties are the same?