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WorksheetsSK015 Pre-UPS II #1 Batch 2021/2022
Total questions: 20
Worksheet time: 5hrs 0mins
The proton numbers of chlorine, potassium and calcium are given: Cl = 17; K = 19; Ca = 20. Thus, we can conclude that the ionic radii of Cl-, K+, and Ca2+ ions increase in the order...
Ca2+ < K+ < Cl-
K+ < Ca2+ < Cl-
Cl- < Ca2+ < K+
Cl- < K+ < Ca2+
The electronic configuration of an element is: 1s22s22p63s23p63d34s2. This element is expected to be...
a d-block element
a non-metal
placed in Group 2 of the periodic table
placed in Group 15 of the periodic table
The following pairs of elements are in Period 3 of the periodic table. Which of these pairs has the greatest difference in boiling points?
Silicon and phosphorus
Silicon and aluminium
Sodium and aluminium
Aluminium and phosphorus
The electronic configuration of the fluoride ion, F-, is different from that of the...
Be2+ ion
Ne atom
Al3+ ion
Na+ ion
In a mass spectrometer, chlorine may exist as Cl2+ ions. Which of the following represents the electronic configuration of the Cl2+ ion? (Proton number of chlorine = 17)
1s22s22p63s23p3
1s22s22p63s23p6
1s22s22p63s23p5
1s22s22p63s23p2
The electronegativities of the elements in... (select the CORRECT statement or statements)
Group 1 increase from potassium to lithium
Group 17 increase from iodine to chlorine
Period 3 decrease from sodium to chlorine
On moving from sodium to chlorine in Period 3 of the periodic table... (select CORRECT statement or statements)
...the relative atomic masses decrease
...the first ionisation energies increase
...the number of electrons in the outermost shell increases
On descending from lithium to caesium in Group 1 of the periodic table... (select the CORRECT statement or statements)
...the first ionisation energies decrease.
...the atomic radii increase.
...the ionic radii increase.
What is the definition of the term isoelectronic?
Isoelectronic is the force that pushes all the electrons of an atom away from the nucleus.
Isoelectronic atoms or ions have the same number of electrons and therefore they have the same electronic configurations.
Isoelectronic atoms or ions have different number of electrons and therefore they have different electronic configurations.
Isoelectronic is the force that pulls all the electrons of an atom to the nucleus.
Hi!! I am element Z! Nice to meet you! If you want to find me, you can try to locate my location in the periodic table. I am at the 2nd period and the 15th group.
What is my valence electronic configuration for when I’ve gained electrons to become Z3-.
2s22p6
2s22p3
3s23p6
3s23p3
Which of the following elements will not form both ionic and covalent compounds?
Na
H
F
Al
Which of the following metals has the lowest boiling point?
Rubidium
Sodium
Magnesium
Manganese
Which of the following molecule is non-polar?
CHCl3
SF6
NH3
H2O
What is the shape of the molecule with the structural formula shown above?
Trigonal pyramidal
Octahedral
Trigonal planar
Tetrahedral
Which of the following molecules has a tetrahedral shape?
O=PCl3
SF4
XeF4
C2H4
The electronic structure of the sulphite ion can be represented as shown above. The bond angle of the O-S-O bond is approximately...
107o
90o
109.5o
120o
Which of the following molecules has six bonding electrons?
NF3
CO2
C2H4
H2O
Which of the following hybrid orbitals is/are used by carbon atoms to form the C-C and C-H bonds in ethene, C2H4?
sp2 hybrid orbitals
sp hybrid orbitals
sp3 hybrid orbitals
sp2 and sp3 hybrid orbitals
Which of the following compounds contain(s) ionic bonds?
Sodium chloride
Aluminium chloride
Silicon (IV) chloride
Which of the following organic compounds are polar molecules?
Chloromethane, CH3Cl
Trichloromethane, CHCl3
Tetrachloromethane, CCl4
