1. Which out of the following elements has the lowest electronegativity: Lithium, Beryllium, Magnesium, Sodium

2. Which out of the following elements has the least metallic character: Lithium, Beryllium, Magnesium, Sodium

3. Which out of the following elements is the largest atom: Lithium, Beryllium, Magnesium, Sodium

The element Sodium (Na) has a low electronegativity of the following elements. The element Beryllium (Be) has the least metallic character. The element Sodium (Na) has the largest atom.

Explanation:

Sodium (Na) which is a delicate, shimmering white, profoundly responsive soluble base metal loses an electron to a chlorine iota since it has seven electrons in its valence shell. It needs one more electron to turn into a steady molecule. It has the most reduced electronegativity of the given components. Beryllium (Be) is a light, silver-gray, relatively soft metal that is strong but brittle has the least metallic character of the given elements. Since from left to right in a period, Metallic character decreases while nonmetallic character increases from top to bottom. Sodium (Na) is the largest atom among the given elements since Atomic size decreases across a period from left to right and increases from top to bottom.