Which of the following elements has the lowest electronegativity? How do you know?

• (A) Lithium
• (B) Carbon
• (C) Bromine
• (D) Fluorine

The element with the lowest electronegativity among the options provided is Lithium (A). Electronegativity is a measure of an atom's ability to attract and hold onto electrons when it forms a bond with another atom. Generally, electronegativity increases across a period from left to right and decreases down a group in the periodic table.

Understanding Electronegativity Trends

In the periodic table:

• Fluorine is the most electronegative element.
• Bromine is less electronegative than fluorine but more than lithium.
• Carbon has a higher electronegativity than lithium as well.
• Lithium, being an alkali metal, has the lowest electronegativity among these choices.

Conclusion

Thus, based on the periodic trends, lithium stands out as the element with the lowest electronegativity in this group.