For students all specialities

INDIVIDUAL WORK-7

For students all specialities

MODUL 2

	Main quantum number
a	Number of energy levels
b	Number of filled atomic orbitals
c	Structure of an external quantum level

	Among the given pairs of elements most similar chemical properties have:
a	Silicon, phosphorus
b	Calcium, silicon
c	Phosphorus, arsenic
d	Silver, nickel

	Among the given series of ions an identical electronic configuration have:
a	О^2– – Мg^2+ – F^–
b	Al^3+ – СІ^– – Са^2+
c	F^– – Na^+ – Са^2+
d	Sc^3+ – S^2– – Na^+

	The serial number of an element, at which begins the filling of the sublevel 5 d with the electrons, is:
a	56
b
c	72
d
f	58

	Among the given electronic configurations to an ion Fe^2+ corresponds:
a	1 s 22 s 22 p 63 s 23 p 63 d 54 s 1
b	1 s 22 s 22 p 63 s 23 p 43 d 64 s 2
c	1 s 22 s 22 p 63 s 23 p 63 d 44 s 2
d	1 s 22 s 22 p 63 s 23 p 63 d 64 s 2
f	1 s 22 s 22 p 63 s 23 p 63 d 6

	How many free d -orbitals contains atom of copper:
a
b	3
c	0
d
f	1

	The type of chemical bond determines:
a	Electronegativity value of each atom
b	Structure of a molecule
c	Structure of a molecule
d	Number of electrons of each atom
f	Distribution of electronic density in a molecule

	Find the charge of complex ion, charge and coordination number of the central atom in the coordination compound [Pt (NH3)4Cl2]3(РО4)2, and also sum of the coefficients in the equation of reaction of exchange of this salt solution with a sulfuric acid solution:
a	2+, 4+, 4, 9
b	4+, 2+, 6, 4
c	2+, 4+, 6, 9
d	2+, 4+, 6, 6
f	2+, 4+, 6, 5

	Find among the given complex salts solutions of identical molar concentration one where the concentration of CN^–-ions will be greatest (Kinst — a constant of instability of complex ions):
a	[Hg(CN)4]2– Kinst = 4,0×10–42
b	[Cd(CN)4]2– Kinst = 7,8×10–18
c	[Cu(CN)4]3– Kinst = 5,0×10–31
d	[Ag(CN)2]– Kinst = 1,1×10–21
f	[Au(CN)2]– Kinst = 5,0×10–39

	Value for the reaction MgCО3(crist) = MgО(crist)+ CО2(g), if react= 117,59 kJ/mol; react= 175,7 J/mol×К, is equal to:
a	67,49 kJ/mol
b	73,18 kJ/mol
c	61,42 kJ/mol
d	69,52 kJ/mol
f	65,23 kJ/mol

	At temperature 150°C a chemical reaction is finished in 16 minutes. For what time this reaction will be finished at temperature 200°C, if its temperature coefficient is equal 2,5:
a	12,4 minute
b	2,7 minute
c	0,94 minute
d	7,5 minute
f	0,16 minute

	Find the initial concentration of chlorine in system CO + Cl2= СОСІ2, if the equilibrium concentrations are: [Сl2] = 0,3 mol/l, [CO] = 0,3 mol/l, [СОCl2] = 1,5 mol/l:
a	1,8 mol/l
b	2 mol/l
c	5,1 mol/l
d	3,2 mol/l
f	0,8 mol/l

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