Question

which atom is the most electronegative?
cl
ni
h
y
se

Explanation:

Electronegativity is a measure of an atom's ability to attract electrons in a chemical bond. In the periodic table, electronegativity generally increases from left to right across a period and decreases down a group. Chlorine (Cl) is a halogen in group 17. Nickel (Ni) is a transition metal. Hydrogen (H) is in group 1. Yttrium (Y) is a transition metal. Selenium (Se) is in group 16. Among these, Cl has the highest electronegativity value based on the periodic table trends.

Answer:

Cl (Chlorine)