Download Blue File

KS3
Science Independent Learning
In this Independent Learning tasks the skill you will be developing is:
To be able to find information from diagrams
Website To
help:
LearningScienceNumeracy
Atoms
Over the years Many Scientists have put forward ‘models’ that they have arrived at from their research of
what they understand an atom to look like…….
Firstly came : ‘J.J Thompson’s ‘Plum Pudding ‘ model which showed
that ‘atoms were tiny balls of positive charge with tiny negative
particles stuck inside ( a little like plums in a plum pudding!!) –
the negative particles he called ‘ELECTRONS’
.
A Little while later Ernest Rutherford and Niels
Bohr developed a model from the findings of their research
which is the widely recognised model that we use today…..
With each atom being made up of a number of sub – atomic particles :
Protons and Positive (+ ve)
Elctrons are Negative (- ve) and
Neutrons are Neutral
Each element in the Periodic Table has its own
Atomic Number ; Number of Proton (which is the same as the number of Electrons
Mass Number ; Number of Protons and number of Neutrons
And are shown on the ‘Periodic Table’ like the symbol of Na (Sodium)
To be able by
to find
information
from
diagrams
All of these numbers can be calculated
simply
locating the
element
in the ‘Periodic Table’ locating
the Atomic Number and locating the Mass Number
Science Independent Learning
KS3
Look at the following atoms.
Lithium
Now Complete the Table using the ’Atom’ diagrams above and your knowledge from the lessons ………
Atom
Atomic
number
(from
Periodic
Table)
Atomic
mass
(from
Periodic
Table)
Number or
protons
Number of
neutrons
Number of
electrons
e.g.Hydrogen
1
1
1
0
1
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Mark …………
Improvements:……..……..……..…….……..……..……..……..……..……..……..…….……..……..……..……..……..……..……..…….……..……..……..……..……..
……..……..…….……..… ..……..……..……..……..…….……..……..……..……..……..……..……..…….……..……..……..……..……..……..……..…….……..…
….……..…..……..……..…….……..……..……..……..……..……..……..…….……..……..……..……..……..……..……..…….……..…
To be able to find information from diagrams