When an atom loses electrons, it becomes a positive ion
Examples:
Na --> Na+ + e-
Mg --> Mg2+ + 2e-
When an atom gains electrons, it becomes a negative ion
Examples:
Cl + e- --> Cl-
O + 2e- --> O2-
If atoms gain electrons, negatively charged anions are formed. If atoms lose electrons, positively charged cations are formed.
An ion.
A positive ion is formed when atoms lose electrons. When a cell gains an electron it becomes negative
Ions are formed when an atom gains or loses electrons. When an atom loses electrons the Ion that is formed has a positive charge.
An ions is formed when an atom gains or loses electrons.
An ions is formed when an atom gains or loses electrons.
A positive ion is formed when atoms lose electrons. When a cell gains an electron it becomes negative
When an atom gains electrons, negatively charged anions are formed. When an atom loses electrons, positively charged cations are formed.
An ion is formed when an atom gains or loses an electrons or electrons. If it gains an electron, it becomes an anion, and if it loses an electron it becomes a cation.
When an atom gains or loses an electron, it forms an ion. If an atom gains an electron, it becomes a negatively charged ion (anion), and if it loses an electron, it becomes a positively charged ion (cation).
An ions is formed when an atom gains or loses electrons.
When an atom gains or loses electrons, it gains a negative or positive charge respectively. Atoms generally try to gain enough electrons to fill their outer, valence electron shell. For the first shell the number of electrons is 2 and for all others, atoms usually want 8 electrons.