AQA GCSE Chemistry – Electrolysis Verified Solution
1. What is the systematic organization of elements in the periodic table called?
Answer: The periodic table is a systematic organization of elements, known as the periodic table, due to
its regularly repeating patterns.
2. Who was the sc...
AQA GCSE Chemistry – Electrolysis Verified Solution
1. What is the systematic organization of elements in the periodic table called?
Answer: The periodic table is a systematic organization of elements, known as the periodic table, due to
its regularly repeating patterns.
2. Who was the scientist who proposed one of the first periodic tables?
Answer: John Dalton proposed one of the first periodic tables, organizing elements in order of atomic
weight.
3. Who built upon Dalton's ideas and arranged elements into sets of eight?
Answer: John Newlands built upon Dalton's ideas and arranged elements into sets of eight, noting that
each eighth element had similar properties.
4. Who is credited with proposing the modern periodic table?
Answer: Dmitri Mendeleev proposed the modern periodic table, leaving gaps for undiscovered elements
and receiving acceptance from the scientific community.
5. What determines an element's position on the periodic table?
Answer: An element's atomic number, which is equal to the number of protons in its nucleus,
determines its position on the periodic table.
6. What is a group in the periodic table?
Answer: A group is a column in the periodic table, and its number equals the number of electrons in an
element's outer shell.
, 7. What is a period in the periodic table?
Answer: A period is a row in the periodic table.
8. Which elements are found to the left of the periodic table?
Answer: Metals are found to the left of the periodic table and are electrical conductors.
9. Which elements are found in the top right-hand corner of the periodic table?
Answer: Non-metals are found in the top right-hand corner of the periodic table and are electrical
insulators.
10. What are the noble gases?
Answer: The noble gases are group 0 of the periodic table.
11. Which elements are part of group 1 of the periodic table?
Answer: Alkali metals are part of group 1 of the periodic table.
12. What trends can be observed when moving down group 1 and 7?
Answer: When moving down group 1 and 7, reactivity decreases due to increasing distance from the
nucleus, occupied energy levels, and size of positive charge on the nucleus.
13. Why do transition metals have higher melting points and densities compared to alkali metals?
Answer: Transition metals have higher melting points and densities due to their stronger bonds and
multiple energy levels.
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