Chemistry BTEC revision

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Subatomic
particle
Mass
Charge
+1
-1
0
On the Periodic table on the left
• Circle where the non-metals are
With different coloured pencils colour in:
• The group where the unreactive gases are
found.
• The group where the alkali metals are found
(very reactive)
Atoms in the same group have similar
properties because they have the same number
of _____________ in the outer shell.
The mass number is the total number of
________ and _______.
The atomic number is the number of
__________.
Match the pictures above with the words
below and define the words
Element
Compound
Mixture
Complete the sentences with the following words. (some are red herrings!) Ionic
element Isotopes
• Isotopes are atoms of the same element with
sodium
electron covalent chlorine chlorine
sodium
Na+
the same/different numbers of protons.
NaCl+ compoundClIsotopes are atoms of the same element with
Sodium chloride NaCl is a ____________. There are __________ bonds between the two
the same/ different numbers of electrons.
elements _________ and _________. When these atoms bond one ____________ from the
• Isotopes are atoms of the same element with
___________ atom is donated to the _____________ atom. This results in 2 ions : _______
the same/ different numbers of neutrons.
and _______.
Complete the
electron
arrangement
of a boron
atom
Complete the
electron
arrangement
of a boron
ion
ion
Lost/
gained?
Number of
electrons
Mg 2+
lost
2
Cl Li +
O 2Fe 3+
Working out Relative Atomic Mass
You need to know 2 things
•
The relative mass of each isotope.
•
The relative abundance of each isotope.
Then:
1.
Times the mass of each isotope by its relative
abundance.
2.
Add together your answers.
3.
Divide by the sum of the relative abundances
Try this example:
A sample of copper (Cu) contains 70-% Cu-63 and 30% Cu-65
Calculate the relative atomic mass of copper
Zinc reacts with oxygen. Zinc oxide is made.
What are the reactants?________ ________
What is the product?_____________
Complete the word equation for this reaction
___________+ ____________ __________ ________
2Zn + O2 2ZnO
How many Zinc and Oxygen atoms are on the left-hand side?
Zn ______
0_______
How many Zinc and Oxygen atoms are on the right-hand side?
Zn ______
O______
Is this equation balanced? Yes/No
pH
2
What do you do?
What happens?
Gives a squeaky pop
Bubble through
limewater
Acid Alkali, neutral?
Purple
Strong Alkali
7
Red
8
Blue
14
Reactions with Acids. Complete the equations
Acid+ metal  salt + hydrogen
Hydrochloric acid + _________  magnesium chloride + hydrogen
_________ acid + zinc  zinc sulfate + Hydrogen
Acid + metal oxide  salt + water
Acid + metal hydroxide  salt + water
Nitric acid + copper oxide- ___________ ___________ + water
Sulphuric acid + ________ _______  zinc sulfate + water
___________acid + sodium hydroxide  sodium chloride + ______
Acid+ metal carbonate  salt + water + carbon dioxide
Hydrochloric acid + sodium carbonate ______ ________ + water +
___________ ____________
Which gas
Colour with
Universal
indicator
Write down the meaning
of these symbols.
Green
Acids have pHs of _____ to _____
Bases (soluble alkalis) have pHs of _______ to ______.
Neutral is pH _______
Indicators are used to….
Complete the equation for a neutralisation reaction:
Acid+ Alkali  ________ + _________
Tick which of the following are real uses of neutralisation reactions.
 Indigestion tablets (neutralising stomach acid)
 In cars (neutralising battery acid)
 On fish and chips (vinegar is an acid)
 In Gardening (Neutralising acidic soils)
 In Lakes (Neutralising lakes which have become acidic due to acid rain
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