Ionic and metallic bonding Flashcards
What is ionic bonding?
The electrostatic force of attraction between positive ions and negative ions
Where does ionic bonding usually occur?
Between a metal and a non-metal.
What is it known as when there is an imbalance in the number of protons and electrons?
ions
What happens when ionic compounds are soluble in water?
As they dissolve the lattice structure breaks up allowing water molecules to surround the separated ions
Do ionic compounds have high or low melting and boiling points and why?
High melting/boiling points because strong ionic bonds must be broken in order to break up the lattice.
When do ionic compounds conduct electricity?
Only when molten or in solution as the lattice structure breaks up allowing the ions to be free to move.
What type of bonding have high melting points and conduct electricity when liquid but not when solid?
Ionic lattice
What structure conducts electricity when solid and have a wide range of melting points.
metallic lattice
How can you identify the metal ions in a substance.
Flame tests, the colour observed will identify the metal ions present.
What are ions?
Ion are particles that have an imbalance in the number of positive protons and negative electrons.
What is the attraction between positive and negative charges known as?
Electrostatic attraction
What are properties of metals?
Good conductors of heat and electricity due to the delocalised electrons, they have a range of melting/boiling points
What is the type of bonding that can conduct electricity when solid and have a wide range of melting and boiling points?
Metallic lattice
Explain why ionic compounds have high melting points
a large number of strong ionic onds must be broken
Explain what happens to compunds such as magnesium chloride when they dissolve in water
The lattice structure breaks up to form free ions
Explain why ionic compounds such as magnesium chloride conduct electricity when molten but not oslid
Ions are only free to move when molten
What is an ion
a charged atom
What is an ionic compunf
A compound made up of a metal and non metal
Explain why ionic compounds have high melting points
They have an ionic lattice structure which is strong so it takes alot of energy to break up
Explain why covalent networks have high melting and boiling points
All the atoms are held togetehr by strong covalent bonds in a large network of atoms and it takes alot of energy to break these bonds
Explain how an ionic bond holds the atoms together
Electrostatic force of attraction between a positive metal ion and a negative non metal ion
Explain fully in terms of electron arrangement why the nobles gases are unreactive
They have a full outer shell of electrons so they are unreactive as they don’t gain or lose electrons
explain what holds the negatively charged electrons in place around the nucleus
the force of attraction between the positive protons and the negative electrons
