KIRINYAGA CENTRAL 233/1 CHEMISTRY PAPER 1 - (THEORY)

KIRINYAGA CENTRAL
233/1
CHEMISTRY PAPER 1 - (THEORY)
JUNE/JULY 2025
23 +
M
11
a) To which chemical family does the element belong?
b) Write the electron arrangement of the atom.
c) Using dots(•) or crosses ( X) to represent electrons draw the structure of the ion.
2. Study the diagram below and answer the questions that follow.
1. The ion of an element is represented as:
(1mk)
(1mk)
(1mk)
a) State and explain the observation made after two weeks.
(2mks)
b) Give one reason for silver plating an iron spoon.
(1mk)
3. Two papers A and B were placed at different levels of a non-luminous flame. Paper A was placed at the
lowest part of the flame while B was placed at the tip.