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Chemistry Module 1 Question Paper

Chemistry Module 1

Course:Secondary Level

Exam Year:2013

NJORO BOYS HIGH SCHOOL
CHEMISTRY MODULE 1 TERM 1
1. Define:
a) an atom
b)an element
c)a molecule
2.Give three sub-atomic paticles
of an atom.
3. State the element found in
period two and in group
seven of the periodic table.
4. Find the relative atomic mass
of an element X which has
isotopes with mass numbers 22,24 and 25 with relative
abundance of 89.6%, 6.4%
and 4.0% respectively.
5. Write the chemical formula of
the following compounds:
a)calcium flouride
b)lead (IV) oxide
c)potassium nitrate
6. Write a balanced chemical
equation for the reaction
between zinc granules and
dilute hydrochloric acid
7. Dìstinguish between;
a) atomic number and mass
number.
b) mass number and relative
atomic mass
8. Define:
a)radicals
b)atomic radius
c)valency
d)ion
9. Define oxidation and give the
oxidation number of:
¡) magnessium
¡¡)copper ion
¡¡¡)chroline ion

Chemistry Module 1 Question Paper

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