Element Li N O Ca Br S CI K Mg Be # Valence Electrons Mg Be 1 5 Name: Ions Worksheet # Electrons to gain # Electrons to lose None 3 Questions: +1 1. If Li loses an electron to another atom, why is it written Li (with a +1)? 1 5 1 None 2. If N gains 3 electrons from other atoms, why is it written N-3 (with a -3)? 3. a. What do you think happens to atomic radius size of a cation & why? b. an anion & why? None 3 Ion Formed/ name Li / cation N-3 / anion Name: Ions Worksheet Element # Valence Electrons # Electrons to gain # Electrons to lose Ion Formed/ name Li Li +/cation N-3 / anion N O Ca Br S CI K Per: 1 None Questions: 1. If Li loses an electron to another atom, why does it have a have a +1 charge? 2. If N gains 3 electrons from other atoms, why does it have a -3 charge?