_______are known as electronegative elements because they form negatively charged ions by the gain of electrons.

Correct option is A

The correct answer is (a) Non-metals.
· Non-metals are known as electronegative elements because they have a high tendency to gain electrons and form negatively charged ions (anions). This property is due to their high electronegativity, which is the ability to attract and hold onto electrons.
· Examples of non-metals that exhibit strong electronegativity include fluorine, oxygen, and chlorine.
Information Booster:
· Alloys:
· Are mixtures of two or more elements, where at least one is a metal. They do not form negatively charged ions by gaining electrons.
· Compounds:
· Are substances formed when two or more elements chemically combine in fixed ratios. Compounds can be made of metals, non-metals, or both, but the term "compounds" does not specifically refer to electronegative elements.
· Mixtures:
· Are combinations of two or more substances that are not chemically bonded. They retain their individual properties and do not form negatively charged ions by gaining electrons.