Edexcel GCSE Physics 2PH01 - Unit P2b Topic 5

Physics P2b Topic 5 - Nuclear Fission and Nuclear Fusion

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Physics P2b Topic 5
Biology
Chemistry
Science
P2a
Physics
P2b Topic 4 Isotopes
Topic 5 Ionising
radiation
Topic 6 Fission &
Fusion
What is an isotope?
Objectives
Recall the meanings of the terms Atomic Number, Mass
number and Relative Atomic Mass.
Understand the term `Isotope and calculate the relative
atomic mass using the mass numbers and abundance of
isotopes

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Page 2

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Physics P2b Topic 5
Write definitions for the following
Mass Number
This is the mass of an atom compared to all the other atoms
in the periodic table.
Atomic Number
This is the number of Protons found in the nucleus of an atom.
Relative Atomic Mass
This is the relative mass of atoms.…read more

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Physics P2b Topic 5
Look at your periodic table. The atomic masses are
all whole numbers except for....
The relative Atomic Mass of
Chlorine is recorded as 35.5.
35.5 ­ 17 = 18.5
You cant have half a neutron.…read more

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Physics P2b Topic 5
75% of the Chlorine in
existence is Cl35
25% of the Chlorine in
existence is Cl37
This means that the atomic mass shown in the periodic table
is an average of the masses of both isotopes taking into
account their relative proportions
(75 x 35) + (25 x 37) = 35.5
100
The periodic table states that the
Relative Atomic Mass of Boron is 11
Boron has two naturally occurring isotopes.…read more

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Physics P2b Topic 5
The periodic table states that the
Relative Atomic Mass of Copper is 64
64
Copper has two naturally occurring isotopes.
69% of all Copper is Cu63 (34 neutrons)
31% of all Copper is Cu65 (36 Neutrons)
Calculate the average relative atomic mass of Copper
(69 x 63) + (31 x 65) = 63.55
100
The periodic table states that the
Relative Atomic Mass of Magnesium is 24
Magnesium has three naturally occurring isotopes.…read more

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Physics P2b Topic 5
Biology
Chemistry
Science
P2a
Physics
P2b Topic 4 Isotopes
Topic 5 Ionising
radiation
Topic 6 Fission &
Fusion
Ionising radiation
Objective: Explain how radioactive
materials can ionise atoms
What is ionisation?
Use the text books to help you…read more

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Physics P2b Topic 5
An atom is ionised if one or more ___________ are
removed from the _______ ______.
If an electron gets enough _______, it can leave the
atom.
______, ______ and _______ radiation can provide
enough _______ to ionise atoms.…read more

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Physics P2b Topic 5…read more

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Physics P2b Topic 5
Complete questions 1-7 in full sentences in your book.
Use the text to help you find the answers.…read more

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Physics P2b Topic 5
Explain how an oxygen molecule in the air might become an
ion by being near a radioactive source.
6 marks = 6 minutes
Answer this with a paragraph and any relevant diagrams.…read more

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