Slide 1 of 4
Science and Technology, Class 9
Ions
Cations · Anions · Valency
By the end you will be able to
⚛️
Say why an atom is neutral
➕
Explain how a cation forms
➖
Explain how an anion forms
🔢
Write the valency of an ion
⚖️An atom is neutral
1
Proton: positive charge
2
Electron: negative charge
3
Sodium: 11 protons, 11 electrons
Presenter notes: Today we find out how an atom can become charged.