If an element gains an electron, will it form a positive ion or a negative ion?

Negative Ion An atom on gaining an extra electron will acquire one unit of negative charge. An atom has equal number of protons and electrons. The total positive charge of protons balance out the total negative charge of electrons.

Ionic Compounds /ExploringOurFluidEarth

Electron Gain Enthalpy Of Elements, Modern Periodic Table

Chemical Bonding Review Worksheet.docx - Chemical Bonding Review

Ionic Compounds /ExploringOurFluidEarth

What is an ion and how is it different from an atom?

What happens when Group 2A elements form ions?

3.1: Ions - Losing and Gaining Electrons - Chemistry LibreTexts

Ionic Bonding — the science sauce

Names and Charges of Ions

What is an ion?

Negative Ions: When Negative Can Be Positive

Difference Between Positive and Negative Ion

Common ions types in positive and negative ion mode

How To Test For Negative Ions, Chemical Tests, Chemistry