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.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Mendeleev's periodic table was arranged by order of (relative) atomic mass, while the modern periodic table is arranged by atomic number.
Step 2
State the name of the salt formed.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The name of the salt formed is aluminium chloride.
Step 3
State the type of reaction that takes place when an acid reacts with a base.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The type of reaction that takes place is called neutralisation.
Step 4
Predict the formula of gallium oxide.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The predicted formula of gallium oxide is Ga₂O₃.
Step 5
What type of substance is gallium oxide?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
