CHAPTER 7 Flashcards
Group 1 and Group 2 elements tend to form cations of charges respectively of:
+3 and +2.
+1 and +2.
+2 and +3.
+2 and +1
+1 and +2.
Which one of the following statements about the oxidation states of metals is true?
All metals tend to lose electrons and therefore the oxidation states are easy to predict.
We can predict the most common oxidation states of all metals.
We can predict with some confidence the most common oxidation states of the transition metals, however, such predictions are not possible with the main group metals.
We can predict with some confidence the most common oxidation states of the main group metals, however, such predictions are not possible with the transition metals.
We can predict with some confidence the most common oxidation states of the main group metals, however, such predictions are not possible with the transition metals.
Which of the following would all tend to form cations in ionic compounds:
Mg, Cs, Pb, Co
P, I, Cl, O
P, I, Cl, F
Mg, I, Cl, O
Mg, Cs, Pb, Co
For P, Mg, Al, Cl, these would tend to form which ions in an ionic compound?
P2-, Mg2-, Al3+, Cl-
P2-, Mg2+, Al3-, Cl-
P-, Mg2-, Al3-, Cl-
P3-, Mg2+, Al3+, Cl-
P3-, Mg2+, Al3+, Cl-
Sulphide ion would have an expected electron configuration of:
[Ne]3s23p6
[Ne]3s23p4
[He]2s22p6
[He]3s23p6
[Ne]3s23p6
Rubidium ion would be expected to have an electron configuration of:
[Ar]3d104s24p6
[Kr]5s1
[Ar]3d104s24p65s1
none of these
[Ar]3d104s24p6
The formation of a covalent bond between two hydrogen atoms results in a lower energy/more stable system, whereby both atoms have an electronic configuration similar to:
1s2
1s1
2s2
2s1
1s2
Which one of the following statements about bond polarity is true?
There is a clear line of demarcation in terms of bond polarities, from one extreme where there is complete give and take of electrons, to one where electrons are exactly equally shared.
none of these
We can say categorically that polar bonds occur when the difference in electronegativity is more than 0.4.
There is no clear line of demarcation in terms of bond polarities, from one extreme where there is complete give and take of electrons, to one where electrons are exactly equally shared.
There is no clear line of demarcation in terms of bond polarities, from one extreme where there is complete give and take of electrons, to one where electrons are exactly equally shared.
Which atoms can bond to sulphur so as to produce a partial positive charge on the sulphur atom?
O and F only.
N, O, F, and Cl
F only.
N, O, F only.
N, O, F, and Cl
The most electronegative elements in the Periodic Table are:
Rb, Cs, Fr
H, N, O, F
N, O, F
He, Ne, Ar
N, O, F
Which of the following covalent pairs would be more polar?:
HF and HCl
NO and CO
SH and OH
HF, CO, OH
HF, CO, SH
HCl, CO, OH
HF, NO, OH
HF, CO, OH
The bonds in the molecules, H2, F2 and HF, could be best characterised respectively as:
pure covalent, pure covalent, polar covalent.
pure covalent, polar covalent, polar covalent.
polar covalent, polar covalent, pure covalent.
pure covalent, pure covalent, ionic.
pure covalent, pure covalent, polar covalent.
Consider the following bond types and the difference in electronegativity between the respective atoms:
C–H: 0.4, S–H: 0.4, C–N: 0.5, N–H: 0.9, C–O: 1.0, O–H: 1.4
Which one of these bond types is usually regarded as non-polar?
S-H
C-H
O-H
none of these
C-H
In comparing ammonia and ammonium ion, it is true that:
ammonia is charged and polar and ammonium ion is charged and non-polar.
ammonia is neutral and non-polar and ammonium ion is charged and polar.
ammonia is neutral and non-polar and ammonium ion is charged and non-polar.
ammonia is neutral and polar and ammonium ion is charged and non-polar.
ammonia is neutral and polar and ammonium ion is charged and non-polar.
Hydronium ion would be predicted to be what shape?
bent or angular
seesaw
Trigonal pyramid
tetrahedral
Trigonal pyramid
