Chemistry
State the position of the following in the periodic table:
(a) Alkali metals
(b) Alkaline earth metals
(c) Halogens
(d) Aluminum
Metallurgy
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Answer
(a) Alkali metals — Group I (IA), the first column on the left of the periodic table.
(b) Alkaline earth metals — Group 2 (IIA), the second column on the left of the periodic table
(c) Halogens — Group 17 (VII A)
(d) Aluminium — Group 13 (III A), present on the right of periodic table.
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Name:
(a) a liquid non-metal
(b) two metalloids
(c) a metal which do not corrode easily
(d) two metals which react with cold water
(e) a non-metal which can form a positive ion.
(f) a non-metal which shows reducing property.
From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:
A. Ductile
B. Conduct electricity
C. Brittle
D. Acidic oxides
E. Basic oxides
F. Discharged at anode
G. Discharged at cathode
H. Ionic chlorides
I. Covalent chlorides
J. Reaction with dilute sulphuric acid yields hydrogen
K. 1, 2 or 3 valence electrons
L. 5, 6, 7 valence electrons
(Write the five letters corresponding to the correct characteristics)