Here's why:
* Atoms are neutral: Atoms normally have an equal number of protons (positively charged) and electrons (negatively charged), making them electrically neutral.
* Losing electrons: When an atom loses one or more electrons, it becomes positively charged because it now has more protons than electrons.
* Cations: These positively charged atoms are called cations.
Examples:
* Sodium (Na): A neutral sodium atom has 11 protons and 11 electrons. If it loses one electron, it becomes a sodium cation (Na+) with 11 protons and 10 electrons.
* Calcium (Ca): A neutral calcium atom has 20 protons and 20 electrons. If it loses two electrons, it becomes a calcium cation (Ca2+) with 20 protons and 18 electrons.
Formation of Cations:
Cations are often formed when metals react with nonmetals. Metals tend to lose electrons more easily than nonmetals. This is due to their electron configuration and the fact that they generally have lower electronegativity (attraction for electrons).
