Chemistry Revision For End Of Year Flashcards
Which is the mass number
The top
Which is the atomic number
The bottom
How do you get the mass number (top number)
Protons + neutrons
What is an ionic bond comprised of
Metals + non metals
What is a covalent bond comprised of
Non metals + non metals
What is a metallic bond comprised of
Metals + metals
What is a feature of delocalised electrons
They are not bound to an atom and are free
What is an isotope
Atoms of the same element (have the same number of protons) that contains a different number of neutrons
How do you calculate isotopes
Isotopes abundance x isotope mass number
Divided by
Isotope abundance number
What is relative formula mass (mr)
The total mass number of all atoms that appear in the formula
How do you measure mass
Mass of atoms in formula
Divided by X 100
Total mr
What is Avagadro’s constant number
6.022 x 10 ^23
How to calculate moles
Mass (g)
Divided by
Mr
How to calculate concentration
Mass (g)
Divided by
Volume (dm^3)
Who created the periodic table
Dimitri Mendeleev
What is matter
Anything that occupies space and has mass
Chemical changes
Reactants -> products
What will happen to the overall mass of a product if a gas was produced during a reaction
It will decrease
What is the acronym used to remember which is the cathode and which is the anode
PANIC
Positive Anode Negative Is Cathode
What is the activation energy WITHOUT a catalyst
High
What is the activation energy WITH a catalyst
Low
Who created the plum pudding model
Thomson
Who created the nuclear model
Rutherford
What is crystallisation
Produced solid crystals from a solution
