Download Unit 1B1 - Uddingston Grammar School

Uddingston Grammar School
National 4 Chemistry
Atomic Structure and Bonding
Unit 1 sub-unit b1 Homework 4
1. The table gives the numbers of protons and neutrons in the nuclei of
atoms of different elements.
Element
boron
phosphorus
zinc
zirconium
tin
Number of protons
5
15
30
40
50
Number of neutrons
6
16
35
51
69
Draw a bar graph showing the number of neutrons in the atoms
of the elements listed in the table.
(2)
2. An atom can be represented by a simple diagram.
6 positively
charged particles
6+
66
= 1 electron
(a) Name the structure at the centre of an atom where the positively
charged particles are found.
(1)
(b) Copy and complete the diagram below to show the structure of a neon
atom. You may wish to use page 1 of the data booklet to help you.
neon
(1)
10+
1
3. The table gives information about some atoms.
Atom
P
Q
R
S
T
Atomic number
22
24
24
26
26
Mass number
50
50
54
54
56
Identify the two correct statements.
A
B
C
D
E
Atoms P and Q have the same number of protons
Atoms Q and R have the same number of electrons
Atoms P and S have the same number of neutrons
Atoms R and S are isotopes of each other
Atoms S and T have different chemical properties.
(2)
4. Different numbers are used to give information about atoms.
A
B
C
D
Atomic number
Mass number
Number of outer electrons
Number of electron energy levels
(a)
(b)
Identify the number which is the number of protons plus neutrons
in an atom.
(1)
Identify the number which is the same for sodium and chlorine
atoms.
(1)
5. The diagram represents the structure of an atom.
THE NUCLEUS
Name of
Relative Charge
particle
mass
PROTON
NEUTRON
Name of particle
(c)
OUTSIDE THE NUCLEUS
Relative mass
almost zero
Write down the missing information at (a), (b), (c) and (d).
2
1
(b)
(a)
0
Charge
(d)
(2)
6. There are three different types of silicon atom.
Type of atom
28
Si
14
29
Si
14
30
Si
14
(a)
(b)
Number of protons
Number of neutrons
Copy and complete the table to show the number of protons and
neutrons in each type of silicon atom.
(1)
What name is used to describe these different types of silicon
atom.
(1)
3