Consider five atoms from the second period: lithium, beryllium, boron, carbon, and nitrogen. Which of these elements has the lowest electronegativity value?

Question

A.
lithium
B.
beryllium
C.
boron
D.
carbon
E.
nitrogen

Answer 1

Among the elements listed — lithium, beryllium, boron, carbon, and nitrogen — lithium has the lowest electronegativity value. Electronegativity generally increases across a period from left to right, and since lithium is the first element in the second period, it has the lowest electronegativity of the group.

Therefore, the correct answer is:

A. lithium