Atoms, Compounds and Ions Flashcards
What is the atomic number
The number of protons
When are compounds formed?
Compounds are formed when atoms of two or more elements are chemically combined together
What is an isotope?
Isotopes are different atomic forms of the same element which have the same number of protons but a different number of neutrons
What happens in ionic bonding?n
In ionic bonding atoms lose all gain electrons to form charged particles called ions which are then strongly attracted to one another
What is the mass number?
The total of protons and neutrons
What structure do ionic compounds have?
Ionic compounds have a regular lattice structure
Name the Properties of ionic compounds (2)
1) The ions form a closely packed regular lattice arrangement
2) there are very strong electrostatic forces of attraction between oppositely charged ions in all directions
What are the similar properties between all ionic compounds
1) They all have high melting points and high boiling points due to the strong attraction between ions
2) ionic compounds dissolve easily in water
What happens when ionic compounds melt?
When ionic compounds melt the ions are free to move and they’ll carry electric current
How can you get ionic compounds to conduct electricity?
By melting them or by dissolving them in water.
Dissolving them is easier though as it takes a lot of energy to melt an ionic compound
What is the overall charge of any compound?
Zero
Sodium chloride has a giant ionic structure does it have a high or low boiling point?
High boiling point
Why do ionic compounds conduct electricity when dissolved?
When ionic compounds are dissolved the ions separate and are free to move and the solution these three moving charged particles are the solution to carry electric current
What is covalent bonding?
This is where atoms share electrons with each other so that they have full outer shells
