Page 49 - Chemistry_Form_2

Chemistry
for Secondary Schools

6. Hydrogen is placed in Group I elements because it
(a) is in period 1.
(b) loses an electron.

(c) is an inert gas.
FOR ONLINE READING ONLY
(d) has atomic mass of 1.

7. Group I elements burn in oxygen to form
(a) metal oxides.
(b) non-metal oxides.
(c) hydroxides.
(d) carbon dioxide.

8. (a) A particular metal reacts slowly with water to give a strong alkaline

solution. In which group of the periodic table should it be placed? Give
a reason.
(b) What is common about the noble gases regarding the following
properties?
(i) Electronic arrangements

(ii) Chemical reactions
9. Why are certain elements in the periodic table referred to as metalloids?

10. The following diagram represents the parts of the periodic table with four
areas denoted by 1, 2, 3 and 4:

(a) Which part contains mostly non-metals?
(b) Which part contains most elements whose oxides dissolve in water?
(c) Which part contains transition elements?
(d) Which part mostly contains elements with both metallic and non-
metallic characteristics?

42 Student’s Book Form Two

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