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