WorksheetsRevision 2E
Total questions: 37
Worksheet time: 37mins
Identify the species with the following composition:
9 protons, 10 neutrons and 10 electrons.
F
Ne
K
F-
Ca2+
Bromine (Br) contains 50.52% of 79Br and 49.48% of 81Br
Calculate the relative atomic mass (Ar) of bromine, accurate to two decimal places.
(a)
Antimony (Sb) consist of two isotopes: Sb-121 with an isotopic mass of 120.904 and Sb-123 with an isotopic mass of 122.904. The relative atomic mass of antimony is 121.80.
Calculate the percentage abundance
of isotope Sb-121. Give the result to 1 decimal place.
(a)
State the similarities between a 2s and 3s orbital.
maximum number of electrons - electron capacity
size
shape
energy levels
Which represents the shape of
an d atomic orbital?
Deduce the maximum number of electrons the fourth shell could hold.
(a)
The condensed electron configuration
of chromium (Cr) is:
[Ar] 3d44s2
[Kr] 3d44s2
[Ar] 3d54s1
[Kr] 3d54s1
A condensed electron configuration uses the nearest noble gas to represent:
electrons of the valence shell
core electrons
all electrons of an atom
Which electron configuration is correct for the cuprous ion Cu+
1s22s22p63s23p63d104s1
1s22s22p63s23p63d10
1s22s22p63s23p63d94s1
1s22s22p63s23p63d94s1
Write the full name of HBr(g) compound:
(a)
Write the full name of Ca(NO3)2 compound:
(a)
The first element in the periodic table is:
helium
hydrogen
oxygen
nitrogen
The horizontal rows of the periodic table are called:
rows
periods
lines
groups
The columns of the periodic table are called:
groups
periods
verticals
periodicals
The atomic number is:
the number of shells belonging to an atom
the number of nucleons
the number of protons
the number of neutrons
All the elements in a period have the same:
number of atomic shells
number of valence electrons
number of neutrons
atomic weight
chemical properties
Where in the periodic table are the noble gases located?
in the middle
in the far right column
in the far left column
The abbreviation for _ _ _ _ is Pb
(a)
According to Bronsted-Lowry theory in the following chemical reaction:
NH3(g) + H2O(l) <=> NH4+(aq) + OH-(aq)
ammonia acts as a:
acid
base
amphiprotic substance
Calculate the number of neutrons in the isotope 65Cu:
(a)
Calculate the number of electrons in the ion 55Mn2+
(a)
In which set all the properties are chemical?
flammability, color, toxicity
reactivity, density, solubility in water
odour, taste, flammability
toxicity, reactivity, boiling point
Select the type of chemical reaction
CaCO3 --T--> CaO + CO2
synthesis
decomposition
single-replacement
double-replacement
Balance the following chemical reaction:
xK + yO2 --> zK2O
x=1; y=4; z=2
x=2; y=1; z=1
x=4; y=2; z=2
x=4; y=1; z=2
Balance the following chemical reaction:
xP4O10 + yH2O --> zH3PO4
x=1; y=16; z=4
x=1; y=6; z=4
x=4; y=6; z=4
x=1; y=9; z=6
Select the acidic oxides:
N2O3
Cl2O5
N2O
SiO
B2O3
Complete the chemical reaction:
NaH + H2O --> H2 + (a)
Amphoteric oxide FeO and hydroxide Fe(OH)2 in reaction with acid give:
the same products with the same stoichiometric ratio
the same products with the different stoichiometric ratio
various products
Select the hydrate formula named copper(II) sulfate pentahydrate:
CoSO4·2H2O
CoSO4·5H2O
CuSO4·H2O
CuSO4·5H2O
The most stable iron oxidation state is:
Fe0
Fe+II
Fe+III
none of the above
The following reaction express
H+ + OH- --> H2O
hydrolysis reaction
neutralisation reaction
substitution reaction
combustion reaction
reduction-oxidation reaction
What do we observe when zinc is dissolved in hydrochloric acid?
precipitation
change in color of the solution
gas bubbles
characteristic unpleasant smell
What do we observe when calcium carbonate reacts with hydrochloric acid?
precipitation
change in color of the solution
gas bubbles
characteristic unpleasant smell
What do we observe after mixing two soluble reactants: sulphuric acid and sodium hydroxide in presence of an indicator?
precipitation
change in color of the solution
gas bubbles
characteristic unpleasant smell
What do we observe after mixing two soluble reactants: barium chloride and sodium sulphate?
precipitation
change in color of the solution
gas bubbles
characteristic unpleasant smell
Z czego wynikały błędy w przerobionych zadaniach?
Brak zrozumienia treści polecenia
Zapomniałem niektóre partie materiału po wakacjach
Zbyt mało czasu na udzielenie odpowiedzi
Zbyt szybkie lub omyłkowe zaznaczenie odpowiedzi :)
Inne
Zagadnienia w tematach pokrywały się z przerobionym materiałem w ubiegłym roku:
Tak, w całości
Tak, w dużym stopniu
Tylko częściowo
Brakowało niektórych zagadnień
Nie
