Periodic Table KeY
a1 (a) zig zag line'roughly goes through B\Al, Al\si, Ge\As, sb\Te, Bi\Po (b) 3/4 are metals.
a2 (a) METALS: high metting/boiling points (all solid at room temperature except mercury), high
density, good conductori of heat/electricity, shiny 'lustrous' surface, strong material
(b) NON-METALS. low melting/boiling points (can be gas, liquid or solid at room temperature), low
density, good conductors of heat/electricity, shiny 'lustrous' surface, soft or brittle if solid
a3 (a) METALS: (i) form basic oxides which react with acids to form salts, if oxide soluble in water an
gas,
alkali is formed and turn litmus blue; (ii) react with acids to form a salt solution and hydrogen
compounds
form
ionic
to
non-metals
with
(iii) readily combine
(b) NON-METALS: (i) form acidic oxides that react with alkalis to form salts, if oxide soluble in water it
will turn litmus red; (ii) do not usually react with acids, (iii) readily combine with metals to form
ionic compounds, (iv) combine with other non-metals to form covalent compounds.
aa (a) GROUP - vertical column of chemically similar elements eg Li to Cs are the very reactive Alkali
Metals
(b) PERIOD - a whole horizontal row of elements of varying character eg metals ==> non-metals from
left =-> right
(c) TRANSITION METALS - a series of similar metals which form part of a period, they are strong,
high melting, act as catalysts, form coloured compounds
Q5 Lt-Cs group 1, Be-Ba group 2, B-Tl group 3, C-Pb group 4, N-Bi group 5, O-Po group 6, F-At
group 7, He-Rn grouP 0 or 8
a6 (a) horizontally: period 1 is H to He, period 2 is Li to Ne, period 3 is Na to Ar, period 4 is K to Kr
etc.
a7
t
hydrogen to helium, period 2 lithium to neon, period 3 sodium to argon
(a) Group 1 - lithium, sodium, potassium etc., (b) Group 7 - fluorine, chlorine, bromine etc., (c)
Group 0 or 8 - helium, neon, argon etc., (d) lstTransition Metalseries - scandium, titanium,
vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc
(b) period
Q8 Originally placed in order of 'atomic weight' (we now call this 'relative atomic mass')
Q9 Now placed in order of atomic (proton) number.
Q10 Potassium is a very reactive metal and chemically very similar to sodium and rubidium etc. and
nothing like the unreactive non-metal Noble Gases like neon and krypton.
Argon is an unreactive non-metalvery similar to neon and krypton, and bears little similarity
with sodium or rubidium.
a12 (a) B, (b)A, (c) D, (d) D, (e) A
Q13 (a) chlorine, halogen in group 7', (b) a transition metaleg chromium, iron, copper, nickel; (c)
group 1 alkali metal eg sodium or potassium; (d) a noble gas eg helium or neon, (e) copper, a
transition metal (with gold, they are the only two metals which are not shiny silver-grey); (f) group
1 alkali metals like sodium or potassium; (g) bromine in group 7 halogens; (h) argon, an
unreactive noble gas.