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WorksheetsUjian Penilaian Sumatif 2 SK015 Semester I sesi 2020/2021
Total questions: 20
Worksheet time: 30mins
The electronic configuration of element Z is 1s2 2s2 2p6 3s2 3p6 3d3 4s2. Which of the following statement is true of Z?
It is a Group 2 element.
It is located in d-block.
It is non metal element.
It is located in Period 3.
The electronic configuration of four elements are shown below:
P: 1s2 2s2 2p6 3s2
Q: 1s2 2s2 2p6 3s2 3p3
R: 1s2 2s2 2p6 3s1
S: 1s2 2s2 2p6 3s2 3p4
Which of these elements form acidic oxides?
Elements P and R
Elements Q and S
Elements P and Q
Elements R and S
The electronic configuration of element X is [Ne]3d54s2. Where is X located in the periodic table?
Period 4, Group 2, s-block
Period 4, Group 2, d-block
Period 3, Group 7, s-block
Period 4, Group 7, d-block
Which of the following element has the highest electronegativity?
[Proton number; Cl:17, Na:11, F:9, P:15]
Chlorine
Sodium
Fluorine
Phosphorus
What of the following pairs are NOT isoelectronic ions?
[Proton number; N:7, O:8, Na:11, Mg:12, S: 16, Cl:17, K:19]
Na+ and K+
Na+ and Mg2+
S2- and Cl-
O2- and N3-
Each row (from left to the right) in the periodic table is called a ____.
Group
Period
Unit
Cluster
Element M shows the sharp increase between second and third ionisation energy. This shows that
M has three valence electrons
The third electron is removed from the inner shell
The valence electronic configuration of M is ns2np1
Three electrons are removed from outemost shell.
Which of the following statements is TRUE for elements and ions of Period 3 and Period 4?
[Proton number; Cl:17, Na:11, Cl:17, K:19, Ar:18]
Cl- ion is smaller than Na+ ion.
Cl- ion, K+ ion and Ar atom have the same electronic configuration.
The ionization energy of K atom is higher than that of Na atom.
K+ ion is bigger than its parent atom.
Generally, the first ionization energy increases across a period. But there are some cases that show anomalous behavior. One of these anomalous cases are between elements:
[Proton number; Li: 3, Be: 4, B: 5, C:6, N: 7]
Li and Be
Be and B
B and C
C and N
Which of the following element has the lowest first ionisation energy?
[Proton number; Na: 11, Mg: 12, Al: 13, K: 19]
Sodium
Magnesium
Aluminium
Potassium
Which of the following are resonance for formate ion HCO2-?
[Proton number; H: 1, C: 6, O:8]
I and II
II and III
I and III
I and IV
What is the molecular geometry of SF2 based on VSEPR theory?
[Proton number; S: 16, F: 9]
Linear
Bent
Tetrahedral
Trigonal pyramidal
Which compound does not obey the octet rules?
[Proton number; C: 6, O:8, N: 7, H: 1, S: 16]
CO32-
NH3
SO42-
H2O
I only
I and III
II and III
I, II and III
A covalent bond is most likely to be formed between
atoms with similar ionisation energy
atoms in the same period of the Periodic Table
atoms of a metallic element and atoms of non-metallic elements.
non-metal atoms with a similar in electronegativity
The F-P-F bond angles on PF5 in degrees, are
[Proton number; F:9, P: 15]
I. 180o
II. 120o
III. 90o
I only
I and II
II and III
I, II and III
The following molecules have polar bonds and polar molecules except
[Proton number; S:16, F:9, P:15, Cl: 17]
I only
I and II
II and III
I, II and III
How many unhybridised p orbitals are there in the aluminium atom of the lewis structure AlCl3 below ? [Proton number; Al:13, Cl:17]
0
1
2
3
Which of the following pairs do not form a dative covalent bond to each other?
[Proton number; O:8, H: 1, C:6, N:7, B:5, F: 9, Al:13, Cl:17]
