Question

question 5
1 pts
which of these elements has the greatest attraction for electrons in a covalent bond?
se
as
kr
br

Explanation:

Electronegativity is the measure of an atom's attraction for electrons in a covalent bond. The general trend in the periodic table is that electronegativity increases across a period (from left to right) and decreases down a group. Among the given elements:

• \(Se\) (selenium) is in group 16.
• \(As\) (arsenic) is in group 15.
• \(Kr\) (krypton) is a noble gas (group 18) and generally does not form covalent bonds in the usual sense as its valence shell is full.
• \(Br\) (bromine) is in group 17. Since electronegativity increases from left to right across a period, \(Br\) (which is further to the right than \(Se\) and \(As\)) has a higher electronegativity.

Answer:

Br