2 MODULE UNIT 1
Assignment Part F
Letters coded from A to Z have been assigned to the elements of atomic
numbers 1 (H) to 36 (Kr) with the exception of the elements of atomic numbers
21 (Sc) to 30 (Zn), which means 26 elements are symbolized by a different letter
of the alphabet; the assigned letters do not correspond to these elements
chemical symbol. Using the following clues, find the element represented by
each letters, from A to Z.
A blank table follows the clues. Make a copy of it, and insert the letters A to Z in
the appropriate spaces on the table.
Find more info about the properties of the elements at
http://www.dayah.com/periodic/ or
http://www.lenntech.com/Periodic-chart.htm
Clues
1. Each of the following groups of letters represents a group of elements of the
periodic table: QKA, LHT, JXBE, NUG, YMC, SIFP, WOV, ZRD. Hydrogen
has been placed in the group of alkali metals.
2. Element A is the least dense of its group. Oxygen (O)
3. Of elements J, X, B, E, only J can react to form a compound, and this only
under very special conditions. J Krypton (Kr)
4. M is the most abundant element of air. Nitrogen (N)
5. H forms the stable ion H2+. Magnesium (Mg)
6. V is the most reactive element of its group. Fluorine (F)
7. Element T has the lowest first ionization energy of its group. Calcium (Ca)
8. Element Q is a yellow powder. (S)
9. Sulphur F is the least dense element. Hydrogen (H)
10.
L has the highest melting point of its group. Beryllium (Be)
11.
Element O is a pale green gas. Chlorine (Cl)
12.
P is the least dense solid element. Lithium (Li)
13.
X has the highest first ionization energy of all the elements.
Helium (He)
14.
D has the smallest atomic size of its group. Boron (B)
15.
An atom of element H has twice the number of protons than an
atom of element U. -
16.
On a summer day, R is the only metallic element in liquid state in
the group of elements from A to Z. Gallium (G)
17.
An atom of element C has 15 electrons. Phosphorus (P)
18.
N can be found in computer chips and is smaller than G. N
Silicon (Si) G Germanium (Ge)
19.
An atom of element B has twice the number of electrons than an
atom of element D. B Neon (Ne)
20.
Element I is more reactive than element S. S Sodium I
Potassium
Make a copy of the following table and insert the letters A to Z in the appropriate
places.
1
2
F
X
3
4
5
6
7
8
9
10
P
L
D
U
M
A
V
B
11
12
13
14
15
16
17
18
S
H
Z
N
C
Q
O
E
19
20
21
22
23
24
25
26
I
T
R
G
Y
K
W
J
Total 26 marks
Total marks for Module 2 Unit 1 Assignments: 94 marks
Submission Instructions
Submit your assignment using the drop box on the Assignment page for this unit.