which of the following atom have the greatest atomic radius: sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine
Answers
Answer: Electronic structures
In Period 3 of the Periodic Table, the 3s and 3p orbitals are filling with electrons. Just as a reminder, the shortened versions of the electronic structures for the eight elements are:
Na [Ne] 3s1
Mg [Ne] 3s2
Al [Ne] 3s2 3px1
Si [Ne] 3s2 3px1 3py1
P [Ne] 3s2 3px1 3py1 3pz1
S [Ne] 3s2 3px2 3py1 3pz1
Cl [Ne] 3s2 3px2 3py2 3pz1
Ar [Ne] 3s2 3px2 3py2 3pz2
In each case, [Ne] represents the complete electronic structure of a neon atom.
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First ionisation energy
The first ionisation energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.
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Explanation: