Edexcel A-Level Chemistry: Structure, Bonding and Introductory Organic overview quiz quiz

$[Ar]3d^4 4s^2$

$[Ar]3d^6$

$[Ar]3d^5 4s^1$

$[Ar]3d^8$

A shared pair of electrons with one electron supplied by each of the two atoms

The complete transfer of an electron from one atom across to another atom

A shared pair of electrons where both come from one atom

An electrostatic attraction between metal ions and delocalised electrons

Atomic radius increases and the shielding of the outer electrons increases as well across the period

The number of occupied electron energy levels increases steadily across the period

Electrons are removed from a progressively lower inner shell across the period

Nuclear charge increases while shielding stays similar, so electrons are held more tightly

$+6$

$+4$

$-2$

$+2$

A white precipitate that readily dissolves again in dilute ammonia solution

A cream precipitate that dissolves only in concentrated ammonia

A yellow precipitate that stays insoluble even in concentrated ammonia

No precipitate of any kind forms at all on adding the reagent

Decreases steadily, because the ionisation energy increases on the way down the group

Stays exactly the same all the way down the whole group with no change

Increases, because atomic radius increases and ionisation energy falls

Increases, simply because the nuclear charge increases down the group

$C_2H_4O$

$CHO$

$C_2H_6O$

$CH_2O$

Initiation, propagation, termination

Addition, elimination, substitution

Hydrolysis, oxidation, reduction

Nucleophilic attack, rearrangement, loss of leaving group

The carbon to oxygen bonds within the molecule are not actually polar at all

It is a symmetrical linear molecule, so the bond dipoles cancel

Carbon and oxygen happen to have exactly the same electronegativity value

It contains a single dative covalent bond that cancels the dipole out

1-bromopropane

1,2-dibromopropane

2-bromopropane

propan-2-ol