Ans: The shielding effect explains why valence shell electrons are more easily removed from the atom. The nucleus can pull the valence shell in tighter when the attraction is strong and less tight when the attraction is weakened. The more shielding that occurs, the further the valence shell can spread out.
Above question is incomplete. Complete question is attached below
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Solution:
Reduction potential of metal ions are provided below. Higher the value to reduction potential, greater is the tendency of metal to remain in reduced state.
In present case,
reduction potential of Au is maximum, hence it is least prone to undergo oxidation. Hence, it is
least reactive.
On other hand,
reduction potential of Na is minimum, hence it is most prone to undergo oxidation. Hence, it is
most reactive.
the element would be Iodine (I) bc it has 53 protons
For this reaction, the reactants are the hydrobomic acid and the lithium hydroxide which produces the products lithium bromide and water. The chemical equation should be as follows:
HBr(aq) + LiOH(aq) = LiBr(aq) + H2O(l)