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8.5C
8. Element R and Element Q have the same number of valence electrons. These elements both have similar
chemical behavior, but Element Q has more energy levels than Element R.

Respuesta :

rr1187653

Answer:

i.e belongs to same group because of valence electrons are same

Explanation:

so it has same chemical behaviour. and q has more energy than r ionisation energy decreases from top to bottom

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