In the 19th century, Mendeleev arranged the elements known at the time to form his periodic table - Edexcel - GCSE Chemistry - Question 4 - 2020 - Paper 1
Question 4
In the 19th century, Mendeleev arranged the elements known at the time to form his periodic table.
Mendeleev's periodic table is different from the modern periodic t... show full transcript
Worked Solution & Example Answer:In the 19th century, Mendeleev arranged the elements known at the time to form his periodic table - Edexcel - GCSE Chemistry - Question 4 - 2020 - Paper 1
Step 1
State one difference between Mendeleev's periodic table and the modern periodic table.
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Answer
Mendeleev's periodic table was arranged by order of (relative) atomic mass, whereas the modern periodic table is arranged by atomic number.
Step 2
State the name of the salt formed.
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Answer
The salt formed is aluminium chloride.
Step 3
State the type of reaction that takes place when an acid reacts with a base.
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Answer
The reaction is classified as a neutralisation reaction.
Step 4
Predict the formula of gallium oxide.
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Answer
The formula of gallium oxide is Ga2O3.
Step 5
What type of substance is gallium oxide?
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