Download 1. Which properties of period 3 elements increase from sodium to

1.
Which properties of period 3 elements increase from sodium to argon?
I.
Nuclear charge
II.
Atomic radius
III. Electronegativity
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
2.
Rubidium is an element in the same group of the periodic table as lithium and sodium.
It is likely to be a metal which has a
A.
high melting point and reacts slowly with water.
B.
high melting point and reacts vigorously with water.
C.
low melting point and reacts vigorously with water.
D.
low melting point and reacts slowly with water.
3.
For which element are the group number and the period number the same?
A.
Li
B.
Be
C.
B
D.
Mg
4.
Which pair of elements reacts most readily?
A.
Li + Br2
B.
Li + Cl2
C.
K + Br2
D.
K + Cl2
(Total 1 mark)
(Total 1 mark)
(Total 1 mark)
(Total 1 mark)
5.
Which property decreases down group 7 in the periodic table?
A.
atomic radius
B.
electronegativity
C.
ionic radius
D.
melting point
6.
Which of the reactions below occur as written?
I.
Br2 + 2I– → 2Br– + I2
II.
Br2 + 2Cl– → 2Br– + Cl2
A.
I only
B.
II only
C.
Both I and II
D.
Neither I nor II
7.
Which is an essential feature of a ligand?
A.
a negative charge
B.
an odd number of electrons
C.
the presence of two or more atoms
D.
the presence of a non-bonding pair of electrons
8.
The compounds Na2O, Al2O3 and SO2 respectively are
A.
acidic, amphoteric and basic.
B.
amphoteric, basic and acidic.
C.
basic, acidic and amphoteric.
D.
basic, amphoteric and acidic.
(Total 1 mark)
(Total 1 mark)
(Total 1 mark)
(Total 1 mark)
9.
What is the electron configuration for the copper(I) ion, (Z = 29)?
A.
[Ar]4s23d9
B.
[Ar]4s13d10
C.
[Ar]4s13d9
D.
[Ar]3d10
10.
What is the correct sequence for the processes occurring in a mass spectrometer?
A.
vaporization, ionization, acceleration, deflection
B.
vaporization, acceleration, ionization, deflection
C.
ionization, vaporization, acceleration, deflection
D.
ionization, vaporization, deflection, acceleration
11.
How many electrons are there in all the d orbitals in an atom of xenon?
A.
10
B.
18
C.
20
D.
36
(Total 1 mark)
(Total 1 mark)
(Total 1 mark)
24
+2
12 Mg
12.
How many electrons are there in one
A.
10
B.
12
C.
14
D.
22
ion?
13.
Which ion would undergo the greatest deflection in a mass spectrometer?
16 +
A.
O
16 2+
B.
O
18 2+
C.
O
D.
(16O18O)+
(Total 1 mark)
(Total 1 mark)
14.
A certain sample of element Z contains 60% of 69Z and 40% of 71Z. What is the relative atomic
mass of element Z in this sample?
A.
69.2
B.
69.8
C.
70.0
D.
70.2
(Total 1 mark)
15.
Energy levels for an electron in a hydrogen atom are
A.
evenly spaced.
B.
farther apart near the nucleus.
C.
closer together near the nucleus.
D.
arranged randomly.
(Total 1 mark)
16.
Explain the following statements.
(a)
The first ionization energy of sodium is
(i)
less than that of magnesium.
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(2)
(ii)
greater than that of potassium.
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(1)
(b)
The electronegativity of chlorine is higher than that of sulfur.
……………………………………………………………………………………….
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(2)
(Total 5 marks)
17.
The element vanadium has two isotopes,
(a)
50
23
V and
51
23V,
and a relative atomic mass of 50.94.
Define the term isotope.
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(1)
(b)
State the number of protons, electrons and neutrons in
50
23V.
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(2)
(c)
State and explain which is the more abundant isotope.
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(1)
(d)
State the name and the mass number of the isotope relative to which all atomic masses
are measured.
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(1)
(Total 5 marks)
18.
(a)
Classify each of the following oxides as acidic, basic or amphoteric.
(i)
aluminium oxide
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(1)
(ii)
sodium oxide
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(1)
(iii)
sulfur dioxide
……………………………………………………………………………………
(1)
(b)
Write an equation for each reaction between water and
(i)
sodium oxide
……………………………………………………………………………………
……………………………………………………………………………………
(1)
(ii)
sulfur dioxide.
……………………………………………………………………………………
……………………………………………………………………………………
(1)
(Total 5 marks)
19.
Elements with atomic number 21 to 30 are d-block elements.
(a)
Identify which of these elements are not considered to be typical transition elements.
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(1)
(b)
Complex ions consist of a central metal ion surrounded by ligands. Define the term
ligand.
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(2)
(c)
Complete the table below to show the oxidation state of the transition element.
(3)
ion
Cr2O72–
[CuCl4]2–
[Fe(H2O)6]3+
oxidation state
(d)
Identify two transition elements used as catalysts in industrial processes, stating the
process in each case.
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(2)
(e)
Apart from the formation of complex ions and apart from their use as catalysts, state two
other properties of transition elements.
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(2)
(Total 10 marks)