551554
Frage 1
Frage
Describe the electronegativity and atomic radius trend across a period
Antworten
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The electronegativity decreases across a period The atomic radius decreases across a period
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The electronegativity increases across a period The atomic radius decreases across a period
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The electronegativity Increases across a period The atomic radius increases across a period
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The electronegativity decreases across a period The atomic radius increases across a period
Frage 2
Frage
Melting point increases across a period
Antworten
- True
- False
Frage 3
Frage
non-metals have a giant molecular structure meaning a lot of energy is required to break the bonds
Antworten
- True
- False
Frage 4
Frage
Which two answers correctly describe electrical conductivity
Antworten
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electrical conductivity decreases down a group when they are conductable
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electrical conductivity - made possible by ions or electrons that are not free to move
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electrical conductivity across a period decreases overall
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occurs in covalent bonds
Frage 5
Frage
Ionic radius decreases across the period until formation of the negative ions. Afterwards there is a sudden increase followed by a steady decrease to the end.
Is this true or false?
Image:
WP_000803 (image/jpg)
Antworten
- True
- False
Frage 6
Frage
Why does sulphur have a higher melting point than phosphorous?
Antworten
-
there are higher intermolecular forces between sulphur than phosphorous
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there are lower intermolecular forces between sulphur than phosphorous
Frage 7
Frage
Which physical property increases down a group but decreases across a period
Antworten
-
Ionic radius
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Atomic radius
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Electronegativity
Frage 8
Frage
Why are there no values for atomic radius for noble gases? (two answers)
Antworten
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The atomic radius doesn't affect their nuclear charge
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Nuclei distance is difficult to measure
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They do not generally bond to other atoms
Frage 9
Frage
Which is the correct order of decreasing radii for Cl, Cl+, Cl- ?
Antworten
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Cl, Cl-, Cl+
-
Cl+, Cl, Cl-
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Cl-, Cl+, Cl
-
Cl-. Cl, Cl+
Frage 10
Frage
What are the chemical properties of Group 0 (Noble gases)?
Antworten
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odour, colourless, mono atomic, reactive
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odourless, colourless, mono atomic, unreactive
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odourless, colour, not mono atomic, unreactive
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odour, colour, not mono atomic, reactive
Frage 11
Frage
What are the chemical properties of Group 1 (alkali metals)?
Antworten
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reactivity increases down group, 1 electron in outer shell, form ionic compounds, doesn't conduct electricity, very reactive, low density
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reactivity decreases down group, 1 electron in outer shell, form ionic compounds, doesn't conduct electricity, very reactive, low density
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reactivity increases down group, 1 electron in outer shell, form ionic compounds, conducts electricity, very reactive, low density
-
reactivity increases down group, 2 electron in outer shell, doesn't conduct electricity, very reactive, low density
Frage 12
Frage
Halogens reactivity increases down a group, they form ionic compounds with metals or covalently with non-metals, have 6 in the outer shell, diotomic
Antworten
- True
- False
Frage 13
Frage
There is no displacement reaction in this equation because Iodine is weaker than Bromine
2KBr + I2 ----->
Antworten
- True
- False
Frage 14
Frage
What are the characteristics of chlorides? (tick three)
Antworten
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Na, Mg - alkaline
-
Al - amphoteric
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Si, P, S, Cl - alkaline
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Si, P, S, Cl - acidic
-
Na, Mg - acidic
Frage 15
Frage
'Increasing charge density of the positive ion polarises the chloride ion as we move to the right hand side'. Is this true?
Antworten
- True
- False
Frage 16
Frage
Here is a list describing and explaining the melting point trend across period 3. Which one is INCORRECT
Antworten
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Na -----> Al = steady increase as there is an increase in the availability of electrons in the metallic bonding
-
Si = massive increase since Si has a giant macromolecular structure
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P = slight increase due to as have only van der Waals forces between molecules whereas the others have giant structures; P4 molecule
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S = small increase as have only van der Waals forces between molecules whereas the others have giant structures; S8 molecule
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P= large decrease as have only van der Waals forces between molecules whereas the others have giant structures; P4 molecule
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Cl ---> Ar = decrease as chlorine is a much smaller molecule with weaker van der Waals forces; argon is just a single atom = very weak van der Waals forces
Frage 17
Frage
Which oxides are insoluble in water?
Antworten
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Na2O
-
MgO
-
Al2O3
-
SiO2
-
P4O10 (or P4O6)
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SO3 (or SO2)
-
Cl2O7 Cl2O
Frage 18
Frage
Which oxides DO NOT react with HCl?
Antworten
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Na2O
-
SO3 (OR SO2)
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Al2O3
-
P4O10 (OR P4O6)
-
SiO2
-
MgO
-
Cl2O7 Cl2O
Frage 19
Frage
Which ones react when NaOH is added?
Antworten
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Na2O
-
MgO
-
SiO2
-
H3PO4
-
SO2
-
HCl2O7
-
Al2O3
Frage 20
Frage
Oxides in period 3 are either Basic Oxide, Amphoteric Oxide or Acidic Oxide
Antworten
- True
- False
Frage 21
Frage
Which ones have a good conductivity? (3 answers)
Antworten
-
Na2O
-
Al2O7
-
SiO2
-
P4O10
-
MgO
-
Cl2O7
Frage 22
Frage
Melting point in period 3 oxides increases Na2O --> MgO and then decreases from MgO ---> Cl2O7
Antworten
- True
- False
Frage 23
Frage
Which chlorides across period 3 dissolves in water?
Antworten
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NaCl
-
Al2Cl6
-
SiCl4
-
MgCl2
-
PCl3
-
PCl5
-
Cl2
Frage 24
Frage
Melting point increases across period 3 chlorides
Antworten
- True
- False
Frage 25
Frage
NaCl and MgCl2 are both good conductors and are ionic in nature whereas the rest in period 3 are covalent in nature and don't conduct. True or false?
Antworten
- True
- False
Frage 26
Frage
Which definition of 1st Ionisation Energy and Electronegativity is correct?
Antworten
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1st Ionisation Energy = minimum energy required to remove 1 mole of gaseous electrons from 1 mole of gaseous atoms Electronegativity = ability of an atom to attract electrons in a ionic bond
-
1st Ionisation Energy = minimum energy required to remove 1 mole of gaseous electrons from 1 mole of gaseous atoms Electronegativity = ability of an atom to attract electrons in a covalent bond
Frage 27
Frage
An transition element is:
an element that possesses an incomplete or sub-level in one or more of its oxidation states
Antworten
- True
- False
Frage 28
Frage
Tick the correct properties of transition elements
Antworten
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Variable oxidation number
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complex ion formation
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Catalyst properties
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Coloured complexes
Frage 29
Frage
Why are Sc and Zn not considered as transitional metals?
Antworten
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Sc not transition metal as its common ion Sc³⁺ has no d electrons
-
Zinc not transition metal as contains full d sub level in all oxidation states
-
Zinc not transition metal as contains has no full d sub level in all oxidation states
Frage 30
Frage
What is a ligand?
Antworten
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Species that uses a lone pair of electrons to form dative covalent bonds with a non-metal ion.
-
Species that possesses an incomplete or sub-level in one or more of its oxidation states
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Species that uses a lone pair of electrons to form dative covalent bonds with a metal ion.
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Species which is the arrangement showing the properties of elements repeat periodically
Frage 31
Frage
Why are some of the complexes of the d-block elements coloured?
Antworten
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energy difference between levels corresponds to particular wavelength of light
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because they are
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colour produced complement to wavelength absorbed when electrons excited.
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electron transitions (electron jumps) from one orbital to another
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