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Which element has its outermost electrons in an S sublevel?

The element with its outermost electrons in an S sublevel is found in Group 1 and Group 2 of the periodic table. These elements have their outermost electrons in the S sublevel before transitioning to the D sublevel in subsequent groups.


Are bromine and chlorine in group 7a of the periodic table?

Bromine and chlorine are in group VII A, which could also be designated Group 7a, of the narrow form periodic table that was commonly used before 1980. Most chemists now prefer a wide form periodic table, in which these elements are in column 17.


Why is -NH2 group of aniline protected before nitration?

Aromatic amines cannot be nitrated directly because they give unexpected oxidation products along with nitration products. This is because, HNO3 is not only a nitrating agent but also acts as a strong oxidizing agent. Therefore, to solve this problem, nitration is carried out by protecting the -NH2 group by acetylation. The acetyl group is finally removed by hydrolysis to give a mixture of o- and p-nitro amines.


Is the salt group a scam?

The SALT Group is a state and local tax consulting firm based out of Texas. The SALT Group has been in business for more than 20 years. There website is www.thesaltgroup.com When Googled "The SALT Group" returns many answers. Without a reference to which group, what they do, it's hard to answer the question as posed.


An atom has a first ionization energy of 496 kJmol and a second ionization energy of 4560 kJmol What group of the periodic table would the atom be in?

The significant jump in ionization energy from the first to the second indicates the removal of an electron from a filled energy level. This suggests the atom is in the second group of the periodic table, since elements in this group have a filled outer s sublevel before starting to fill the p sublevel in the subsequent period.