Periodic Table Flashcards
How many sub-atomic particles in an atom and name them
- Protons, neutrons and electrons
Define an element
Contains one type of atom and cannot be broken down further
Define a compound
Elements combined chemically to form a compound. Atoms of different elements chemically bonded
Why are noble gases stable?
Because their outer electron shell is full. The atoms of other elements have incomplete outer shells
Name 3 ways electrons can obtain similar outer electron shells to the noble gases
By losing electrons, by gaining them and by sharing them
A negative ion is called
Anion
A positive ion is called
A cation
What’s an ionic bond
When a metallic element reacts with non-metallic elements .
Why do metal atoms tend to become cations
Because they tend to lose electronic ms causing them to become positively charged
Why do non-metallic elements tend to become anions
Because they tend to gain electrons causing them to become negatively charged
What’s the half reaction for a sodium ion
Na –> Na+ + e-
What’s the half reaction for a chlorine ion
Cl + e- –> Cl-
Give an example of an ionic bond
Sodium chloride
Explain how the ions are arranged when they bond
The ions cluster together so that each cation is surrounded by an anion. This pattern is called a lattice/ crystal lattice.
Substances formed by ionic bonds do not contain molecules- what are they made up of?
Ions
