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WorksheetsChallenging game
Total questions: 40
Worksheet time: 31mins
Which of the following pairs of particles has the same number of electrons?
(note p. 4)
Ca2+ and P3–
Mg2+ and Ar
He and F–
Ne and P3–
What is the number of electrons in a Ca atom?
(sing and think)
16
18
20
22
What is the number of electrons in a Ca2+ ion?
16
18
20
22
What is the number of electrons in a P3- ion?
16
17
18
19
Atoms can obtain the stable electronic arrangements of atoms of _______ by gaining or losing electrons.
halogens
noble gases
alkali metals
Sodium atoms are _______ sodium ions.
equal to
not equal to
Atom X is a group III element. The ion of X is
X+
X2+
X3+
X2-
X3-
Atom X is a group VI element. The ion of X is
X+
X2+
X3+
X2-
X3-
Atom X is a group V element. The ion of X is
X+
X2+
X3+
X2-
X3-
An oxide of X is X2O3. The ion of X is
X+
X2+
X3+
X2-
X3-
An oxide of X is X2O. The ion of X is
X+
X2+
X3+
X2-
X3-
A Conductor
conduct electricity in molten state or aqueous solution but not in solid state, and are decomposed during the conduction.
conduct electricity but are not chemically changed during electrical conduction
do not conduct electricity in solid, molten state or aqueous solution.
A non-conductor
conduct electricity in molten state or aqueous solution but not in solid state, and are decomposed during the conduction.
conduct electricity but are not chemically changed during electrical conduction
do not conduct electricity in solid, molten state or aqueous solution.
An electrolyte
conduct electricity in molten state or aqueous solution but not in solid state, and are decomposed during the conduction.
conduct electricity but are not chemically changed during electrical conduction
do not conduct electricity in solid, molten state or aqueous solution.
A calcium atom (______) needs to lose two electrons to give calcium ion (_______).
Ca2+, Ca
Ca , Ca2+
Ka2+, Ka
Ka , Ka2+
An oxygen atom (______) needs to gain two electrons to give oxide ion (_______).
O , O2-
O , O-
O2-, O
O-, O
In ammonium nitrate NH4NO3 , _____________are held by strong ionic bonds.
the ammonium ions NH4+ and nitrate ions NO3-
the ammonium ions NH42+ and nitrate ions NO32-
the ammonium ions NH4+ and nitrate ions NO3-
MgCl2 is called
magnesiumchlorine
magnesium chlorine
magnesiumchloride
magnesium chloride
The chemical formula of a dichromate ion is
CrO7-
CrO72-
Cr2O7-
Cr2O72-
The chemical formula of a carbonate ion is
CO3-
CO32-
CO-
CO2-
The chemical formula of a sulphite ion is
SO42-
SO32-
S2-
SO24-
The chemical formula of iron(III) sulphate is
FeSO4
Fe3SO4
Fe2(SO4)3
Fe3(SO4)2
The coloured ions in peridot is
iron(II) ion
iron(III) ion
dichromate ion
Which of the following ion is colourless?
copper(II) ion
iron(III) ion
dichromate ion
sulphate ion
Which of the following ion is colourless?
permanganate ion
iron(II) ion
chromium(III) ion
potassium ion
The chemical formula of the carbonate of X is XCO3. What is the ion of X?
X+
X2+
X3+
X-
X2-
The chemical formula of the sulphate of X is X2(SO4)3. What is the ion of X?
X+
X2+
X3+
The chemical formula of sodium dichromate is
NaCr2O7
Na2Cr2O7
Na3Cr2O7
Na(Cr2O7)2
Na(Cr2O7)3
Which of the following process can produce hydrogen from sea water?
distillation of sea water
filtration of sea water
electrolysis of sea water
evaporation of sea water
Which of the following process can separate sodium chloride from sodium chloride solution?
filtration of sea water
electrolysis of sea water
evaporation of sea water
In the flame test of a sodium sulphate sample, the colour of the flame is
golden yellow
brick-red
lilac
bluish green
In the flame test of a copper(II) nitrate sample, the colour of the flame is
golden yellow
brick-red
lilac
bluish green
bromine combines with magnesium to form
magnesium bromide
bromine magneside
magnesium(II) bromide
bromine magneside(II)
How to test for the presence of chloride ion in table salt?
Add excess dilute nitric acid then add an aqueous solution of silver nitrate to the sample. A colourless precipitate will be produced.
Dissolve the sample in water. Add excess dilute nitric acid then add an aqueous solution of silver nitrate. A white precipitate will be produced.
Dissolve the sample in water. Add aqueous solution of silver nitrate then add excess dilute nitric acid. An orange precipitate will be produced.
In the experiment of migration of ions, the cations are attracted to
positive electrode
negative electrode
In which group will X be if X forms a nitride with the chemical formula X3N2?
X forms a nitride X3N2. X is probably a Group I metal.
X forms a nitride X3N2. X is probably a Group II metal.
X forms a nitride X3N2. X is probably a Group III metal.
In which group will X be if X forms a chloride with the chemical formula XCl?
X forms a chloride XCl. X is probably a Group I metal.
X forms a chloride XCl. X is probably a Group II metal.
X forms a chloride XCl. X is probably a Group III metal.
In which period will X be if an atom of X has five occupied electron shells.
An atom of X has five occupied electron shells. X is probably a Period 3 element.
An atom of X has five occupied electron shells. X is probably a Period 5 element.
In ionic compounds, there are
strong ionic bonds between oppositely charged atoms.
strong ionic bonds between oppositely charged ions.
strong ionic bonds
Which of the following is the use of sodium hydroxide?
as rock fuel
sterilising swimming water
making bleach
making PVC
