Periodic table and inorganic chemistry

Written by Dr. Ayesha Nadeem (Chemistry)

MDCAT · Chemistry · 8 questions

Name: ____________________ Date: ____________

Which halogen is the most reactive?
- A Fluorine
- B Bromine
- C Chlorine
- D Iodine
Which of these elements is in Group 2 of the periodic table?
- A Aluminium
- B Magnesium
- C Potassium
- D Sodium
Noble gases are chemically unreactive mainly because they:
- A Have a full outer shell of electrons
- B Are very heavy
- C Are always liquids
- D Have no protons
Transition metals show several oxidation states because:
- A They are very dense
- B They have no valence electrons
- C They always lose all their electrons
- D Their 4s and 3d electrons have similar energies
Which halogen is a liquid at room temperature?
- A Fluorine
- B Iodine
- C Bromine
- D Chlorine
Aluminium oxide is described as amphoteric because it:
- A Reacts with both acids and bases
- B Is a good conductor
- C Is soluble in water
- D Is a strong oxidising agent
Which allotrope of carbon conducts electricity?
- A Diamond
- B Graphite
- C Both
- D Neither
What is the colour of an aqueous solution of copper(II) sulphate?
- A Colourless
- B Blue
- C Green
- D Yellow

Answer key

1. A, 2. B, 3. A, 4. D, 5. C, 6. A, 7. B, 8. B

Reactivity of halogens decreases down the group, so fluorine is the most reactive.
Magnesium is an alkaline earth metal and sits in Group 2.
A complete outer shell, such as 8 electrons, makes the atom very stable.
The 4s and 3d levels are close in energy, so different numbers of electrons can be lost.
Bromine is a red-brown liquid. Chlorine and fluorine are gases and iodine is a solid.
An amphoteric oxide can react with both acids and bases to form salts.
Graphite has free, delocalised electrons between its layers. Diamond has none.
Hydrated copper(II) ions give a characteristic blue colour.