CIE iGCSE Co-Ordinated Science C8.2 Group I properties Exam Style Questions Paper 3
Question
11. (a) (i) Identify three metals from Table 11.1 that have only one electron in their outer shell as a neutral atom.
▶️Answer/Explanation
Answer: lithium; potassium; sodium
Sub-topic Code: C16.1 (Atomic Structure)
Detailed Solution: Lithium, potassium, and sodium are Group I metals, which have only one electron in their outer shell as neutral atoms.
11. (a) (ii) Identify the two metals from Table 11.1 that are Group II metals.
▶️Answer/Explanation
Answer: calcium; magnesium
Sub-topic Code: C16.1 (Atomic Structure)
Detailed Solution: Calcium and magnesium are Group II metals, which have two electrons in their outer shell as neutral atoms.
11. (b) State three general physical properties that distinguish metals from non-metals.
▶️Answer/Explanation
Answer: good thermal conductors; good electrical conductors; (relatively) high melting point / boiling point; malleable
Sub-topic Code: C16.1 (Metals and Non-Metals)
Detailed Solution: Metals are good thermal and electrical conductors, have relatively high melting and boiling points, and are malleable (can be hammered into shape).
11. (c) Use words from the list to complete the description of electroplating.
▶️Answer/Explanation
Answer: negative; positive; electrolyte
Sub-topic Code: C19.1 (Electrolysis)
Detailed Solution: In electroplating, the object to be plated is connected to the negative terminal (cathode), the piece of copper is connected to the positive terminal (anode), and the aqueous copper(II) sulfate acts as the electrolyte.