For elements in the third row of the periodic table, as atomic size increases, e

Question

For elements in the third row of the periodic table, as atomic size increases, electronegativity___ and the first ionization energy, IE1,____

a) increases, increases

b) increases, decreases

c) decreases, increases

d) decreases, decreases

2. Consider the reaction in which the reactant bonds are relatively weak and the product bonds and relatively strong. This reaction is...

a) exothermic and releases heat.

b) exothermic and absorbs heat.

c) endothermic and releases heat.

d) endothermic and absorbs heat.

Explanation / Answer

1) Answer : c) decreases, decreases

Due to electrons are increasing in the next higher shell so nuclear interactions decreases hence removal elctron will require less energy and addition electron will releases less energy.

2) Answer : a) exothermic and releases

since weaker bonds require lower energy to break the bond and also releases lower energy when bond formation and vice versa.

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