EDEXCEL CHEMISTRY PAPER 2
QUESTIONS WITH CORRECT
ANSWERS
Proton c/m? - Correct Answer - +1, 1
Neutron c/m? - Correct Answer - 0, 1
Electron c/m? - Correct Answer - -1, 1/1500
Mass number? - Correct Answer - Num of protons + neutrons
Atomic number? - Correct Answer - Num protons
Isotope? - Correct Answer - Different atom of the same element, same num protons.
Diff number neutrons.
Mendeleev vs Now? - Correct Answer - Mendeleev: Gaps for elements, No noble
gases, fewer elements.
Both had metals and non-metals.
Both had groups/periods
Periods? - Correct Answer - Rows, Increasing atomic mass.
Period num = num shells.
Groups? - Correct Answer - Elements similar properties.
Same num outer electrons.
Ion? - Correct Answer - An atom with a positive or negative charge
Ionic compound structure? - Correct Answer - Lattice.
Regular arrangement ions.
Held by ionic bonds between oppositely charged ions.
Covalent bond? - Correct Answer - Pair of electrons shared between 2 atoms
Ionic? - Correct Answer - Compound composed of ions
Simple molecular (covalent)? - Correct Answer - Atoms joined by covalent bonds
, Ionic properties? - Correct Answer - High MP + BP - strong forces between opp ions.
Only conduct when molten or dissolved.
Covalent properties? - Correct Answer - Low MP + BP - weak intermolecular forces.
Poor conductors.
Diamond? - Correct Answer - Each carbon atom, 4 strong covalent bonds = High MP.
Rigid lattice structure makes diamond hard.
Doesn't conduct, no free electrons.
Graphite? - Correct Answer - Each atom, 3 covalent bonds = strong
High MB + BP
No bonds between layers, move over each other.
Each atom, has one delocalised electron - conducts electricity.
Fullerenes? - Correct Answer - Molecules of carbon, arranged in hexagons.
Used cage other molecules, deliver drugs.
Huge SA.
Graphene? - Correct Answer - Fullerene.
Sheet of carbon atoms joined together in hexagons.
1 sheet thick.
Covalent bonds.
1 Delocalised electron to conduct electricity.
Metal properties? - Correct Answer - Shiny solids.
High MPs, density + good conductors.
Non-metal properties? - Correct Answer - Low Bps + poor conductors.
1 dm^3? - Correct Answer - 1000cm^3
Avogadro constant? - Correct Answer - 6.02 x 10^23
Moles? - Correct Answer - Moles = Mas/RFM
Which group on the periodic table is alkali metals? - Correct Answer - Group 1
Which group on the periodic table is the halogens? - Correct Answer - Group 7
Which group on the periodic table is the noble gases? - Correct Answer - Group 0
What properties do alkali metals have? - Correct Answer - Soft.
Relatively low melting points.
QUESTIONS WITH CORRECT
ANSWERS
Proton c/m? - Correct Answer - +1, 1
Neutron c/m? - Correct Answer - 0, 1
Electron c/m? - Correct Answer - -1, 1/1500
Mass number? - Correct Answer - Num of protons + neutrons
Atomic number? - Correct Answer - Num protons
Isotope? - Correct Answer - Different atom of the same element, same num protons.
Diff number neutrons.
Mendeleev vs Now? - Correct Answer - Mendeleev: Gaps for elements, No noble
gases, fewer elements.
Both had metals and non-metals.
Both had groups/periods
Periods? - Correct Answer - Rows, Increasing atomic mass.
Period num = num shells.
Groups? - Correct Answer - Elements similar properties.
Same num outer electrons.
Ion? - Correct Answer - An atom with a positive or negative charge
Ionic compound structure? - Correct Answer - Lattice.
Regular arrangement ions.
Held by ionic bonds between oppositely charged ions.
Covalent bond? - Correct Answer - Pair of electrons shared between 2 atoms
Ionic? - Correct Answer - Compound composed of ions
Simple molecular (covalent)? - Correct Answer - Atoms joined by covalent bonds
, Ionic properties? - Correct Answer - High MP + BP - strong forces between opp ions.
Only conduct when molten or dissolved.
Covalent properties? - Correct Answer - Low MP + BP - weak intermolecular forces.
Poor conductors.
Diamond? - Correct Answer - Each carbon atom, 4 strong covalent bonds = High MP.
Rigid lattice structure makes diamond hard.
Doesn't conduct, no free electrons.
Graphite? - Correct Answer - Each atom, 3 covalent bonds = strong
High MB + BP
No bonds between layers, move over each other.
Each atom, has one delocalised electron - conducts electricity.
Fullerenes? - Correct Answer - Molecules of carbon, arranged in hexagons.
Used cage other molecules, deliver drugs.
Huge SA.
Graphene? - Correct Answer - Fullerene.
Sheet of carbon atoms joined together in hexagons.
1 sheet thick.
Covalent bonds.
1 Delocalised electron to conduct electricity.
Metal properties? - Correct Answer - Shiny solids.
High MPs, density + good conductors.
Non-metal properties? - Correct Answer - Low Bps + poor conductors.
1 dm^3? - Correct Answer - 1000cm^3
Avogadro constant? - Correct Answer - 6.02 x 10^23
Moles? - Correct Answer - Moles = Mas/RFM
Which group on the periodic table is alkali metals? - Correct Answer - Group 1
Which group on the periodic table is the halogens? - Correct Answer - Group 7
Which group on the periodic table is the noble gases? - Correct Answer - Group 0
What properties do alkali metals have? - Correct Answer - Soft.
Relatively low melting points.
