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Worksheets6.0 PERIODIC TABLE (CHEMISTRY DK014)
Total questions: 20
Worksheet time: 10mins
Which of the following is the electronic configuration of a Group 3 element?
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2 3p6 4s2 3d1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1
An element X has the electronic configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d7. It is likely to be
A transition metal
A group 7 element
A group 17 element
A s block element
In the modern Periodic table, the elements are arranged in the order of increasing
Relative atomic mass
Proton number
Nucleon number
First ionisation energy
The atomic radius of the group 1 element generally increases down a group because
The effective nuclear charge increases
The number of electrons increases
The number of shells increases
The number of protons increases
Which of the following atoms has the smallest size?
N
Be
P
Ne
An element M have a np5 electronic configuration in its outermost sub-shell. M is likely to be found in group
5
7
15
17
Which of the following ions has the largest size?
P3-
Cl-
Na+
Al3+
Determine the period, group and block for the following electronic configuration,
1s2 2s2 2p6 3s2 3p5
Group 15, Period 3, s-block
Group 7, Period 3, p-block
Group 17, Period 3, p-block
Group 5, Period 3, s-block
Determine the period, group and block for the following electronic configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d5
Group 5, Period 3, s-block
Group 7, Period 4, d-block
Group 17, Period 3, d-block
Group 17, Period 4, d-block
Element Q has the following electronic configuration:
1s2 2s2 2p4
Which of the following statements is/are true about Q?
i. Q is an element of group 16
ii.Q can form Q2- ion
iii. Q is an element in a s-block
iv. Q is an element in p-block
ii, iii, iv
i, ii, iv
iii and iv
ii and iv
The table above shows various elements with their proton numbers.
Which of the elements has the highest first ionisation energy>
P
Q
R
S
Sodium atom is larger than the sodium ion because
Na+ has octet configuration
Na atom is more reactive
Na atom has three shells filled with electrons
Na+ is more reactive than Na atom
Based on the position of an element in the periodic table, which of the following has the highest electronegativity?
Period 2, Group 13
Period 2, Group 16
Period 2, Group 2
Period 2, Group 1
The energy required to remove one mole of electron from the outermost shell is called
Potential energy
Kinetic energy
Ionisation energy
Thermal energy
Element X and Y are in the third period of the periodic table and have 2 and 5 valence electrons respectively. What is the formula of the compound formed between X and Y?
X2Y5
X5Y2
X3Y2
X2Y3
Periodicity of the elements in the periodic table refers to the
Arrangement of elements in the increasing order of proton numbers
Arrangement of elements in the increasing order of neutron numbers
Electronegativity of elements across a period
Classification of elements based on the increasing proton numbers and similar valence electron configuration
Electronegativity ________ from left to right within a period and _________ from top to bottom within a group.
decreases, increases
increases, decreases
Increases, increases
stays the same, increases
The element with the lowest electronegativity in Period 3 is
Na
Ar
Cl
Mg
Based on the data given in below, arrange the elements in ascending order of atomic size
W: 1s2 2s2 2p3
X: 1s2 2s2 2p5
Y: 1s2 2s2 2p6 3s1
Z: 1s2 2s2 2p6 3s2 3p2
W < X < Z < Y
X < W < Z < Y
Y < Z < W < X
Z < Y < W < X
An element Y has the following electronic configuration:
1s2 2s2 2p6 3s2 3p6 3d5 4s2
Choose the correct statement(s) for element Y
I. Y form ion with 2+ charge
II. Y is a transition metal
III. Y is located in period 4, d- block element
I only
I & II
II & III
I, II, III
