1. Predict which element would have the largest difference between the first and second ionization energies...

1. Predict which element would have the largest difference between the first and second ionization energies

a) Sodium b) Phosphorus c) silicon d) magnesium

2. Arrange the elements Li, Ne, Ar, and Na in increasing order of the energy required to remove the first electron from their respective atoms

a) Na < Li < Ar < Ne b) Na < Li < Ne < Ar c) Li < Na < Ar < Ne d) Ar < Ne < Na < Li

3. Which pair of elements has the most similar chemical properties?

a) C and F b) Li and Be c) P and As d) As and Se

Solutions

Expert Solution

1. answer is option a) sodium

reason: after first ionization sodium attain stable inert gas configuration similar to neon therefore removal of second electron is difficult therefore second ionization energy is large compare to first.

2. answer is option b) Na < Li < Ar < Ne

reason: as we go down the group electron can be removed easily therefore electron from sodium can be removed easily compare to Lithium and similarly electron from argon can be removed easily compare to neon. generally removing electron from argon and neon is difficult due to stable inert configuration.

3. answer is option c) P and As

elements of same group will have similar chemical properties. P and As belong to group 15

queen_honey_blossom answered 1 year ago

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