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Ionic Bond

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how to calculate valence electron for higher at.no. elements like pt,au etc

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Q. How to calculate valency of element having atomic number more than 20. For ex,iron,manganese,copper,etc

Q. Assertion :The valence electrons of most electropositive elements are 8. Reason: Elements with 8 valence electrons are stable due to completely filled valence shell.

Q. (i) How do you calculate the possible valency of an element from the electronic configuration of its atoms?
(ii) Calculate the valency of element X whose atomic number is 9.

Q. How many valence electrons are present in element Q?

Q. Elements X and Y have valence shell electronic configurations

X = n s^{2} n p^{5}; Y = n s^{2} n p^{3}

. Which compound is likely formed from X and Y?

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