Assignment 1
Topic: Atomic Structure1
Subject: Chemistry 9701
Answer the following Question.
a Describe the structure of an atom, giving details of the subatomic particles present.
[6]
b Explain the terms atomic number and nucleon number.
[2]
c Copy and complete the table:
[2]
Neutral
Atomic
Nucleon
Numbers of each subatomic particle
atom
number
number
present
Mg
12
24
Al
13
27
d Explain why atoms are neutral.
[1]
e An oxygen atom has 8 protons in its nucleus. Explain why it cannot have 9 protons.
[1]
f When deducing the relative mass of an atom, the electrons are not used in the calculation.
Explain why not
.[1]
[Total: 13]