CP4+Ions+Group+2


 * Ion-** an atom or molecule that has a net positive or net negative charge due to the loss/gain of electrons

**Questions-** How many extra electrons would be needed to give an atom a 7- charge? 7 extra electrons If an atom has a 2+ charge and has 20 electrons, which element is it? Ti What does it mean by a net positive or net negative charge in the definition? If an atom has a net positive charge it lost electrons and if it is a negative charge it has gained electrons. What type of electrons are usually exchanged as it becomes an ion? There is only one type of electron How does an ion change an atom different than an isotope would? An ion changes an atoms charge and an isotope just changes the number of neutrons. How would you notate the following O 2+ Al 7- H 5-
 * 1) Oxygen which 2 lost electrons
 * 1) Aluminum with 7 extra electrons
 * 1) Hydrogen with 6 electrons


 * Useful Links-**

Ions slide show- Slide Show we viewed in class [|Worksheet]- Useful practice [|Atomic Structure + Ions/Isotopes]- Reviews basic principles [|Ion Information]- Important information on ions

**Tips** Gaining an electron = 1 negative charge Losing an electron = 1 positive charge In a neutral atom --> the number of electrons equals number of protons (therefore if you know the charge you can figure out what element it is)