Atomic Structure
Periodic Table
Chemical Bonding
Quantitative Chemistry
Energy and Reactions
100
The relative charge of a proton
What is +1?
100
The name of Group 1 elements
What are alkali metals?
100
What type of bonding occurs between a metal and a non-metal?
Ionic
100
What is the relative formula mass (Mr) of carbon dioxide CO2
44
100
What type of reaction absorbs heat?
Endothermic
200
The Scientist who proposed the plum pudding model
Who is JJ Thomson
200
How did Mendeleev predict the properties of elements that had not yet been discovered?
He left gaps
200
What is this type of diagram called?
Dot and Cross
200
Calculate the percentage by mass of oxygen in H2O
18/16×100=88.9%.
200
What type of reaction is this
exothermic
300
Alpha particles prove the existence of "blank" in the atom
What is nucleus?
300
Why do Group 0 elements have low reactivity?
They have full outer shells
300
Why are metals good conductors of electricity?
They have delocalized electrons that can move freely.
300
If 2 moles of hydrogen react with oxygen, how many moles of water are produced?
2 moles.
300
Define activation energy
The minimum energy required for a reaction to occur.
400
Calculate the number of neutrons in an isotope of chlorine with a mass number of 35 and an atomic number of 17.
18 neutrons.
400
Why is potassium more reactive than lithium?
Has more shells- easier to give up its outer electron
400
Explain why diamond has a high melting point.
Each carbon atom is covalently bonded to four others in a giant structure.
400
Define the term limiting reactant
The reactant that is completely used up in a reaction, determining the amount of product formed.
400
How is bond energy related to reaction enthalpy? Write the formula for reaction enthalpy
Reaction enthalpy = Total bond energies of reactants - Total bond energies of products.
500
why are isotopes chemically identical?
They have the same number of electrons
500
Predict the product of a reaction between chlorine and potassium bromide solution
Bromine and potassium chloride.
500
Describe the structure of graphene
Graphene is a single layer of carbon atoms arranged in hexagonal rings;
500
What is the formula for calculating moles
moles = mass/ Mr
500
Calculate the energy change if breaking bonds requires 500 kJ/mol and forming bonds releases 700 kJ/mol.
-200 kJ/mol (exothermic reaction).